19485498240 has 512 divisors, whose sum is σ = 75014553600. Its totient is φ = 4751695872.

The previous prime is 19485498233. The next prime is 19485498247. The reversal of 19485498240 is 4289458491.

It is a happy number.

19485498240 is a `hidden beast` number, since 1 + 9 + 485 + 49 + 82 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (19485498233) and next prime (19485498247).

It is a super-2 number, since 2×19485498240² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19485498247) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28528939 + ... + 28529621.

It is an arithmetic number, because the mean of its divisors is an integer number (146512800).

Almost surely, 2^19485498240 is an apocalyptic number.

19485498240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19485498240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37507276800).

19485498240 is an abundant number, since it is smaller than the sum of its proper divisors (55529055360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19485498240 is a wasteful number, since it uses less digits than its factorization.

19485498240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851 (or 833 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 19485498240 in words is "nineteen billion, four hundred eighty-five million, four hundred ninety-eight thousand, two hundred forty".