19452478752 has 384 divisors, whose sum is σ = 69207022080. Its totient is φ = 5188976640.

The previous prime is 19452478733. The next prime is 19452478757. The reversal of 19452478752 is 25787425491.

It is a super-2 number, since 2×19452478752² (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 not an unprimeable number, because it can be changed into a prime (19452478757) 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, 14085102 + ... + 14086482.

It is an arithmetic number, because the mean of its divisors is an integer number (180226620).

Almost surely, 2^19452478752 is an apocalyptic number.

19452478752 is a gapful number since it is divisible by the number (12) 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 19452478752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34603511040).

19452478752 is an abundant number, since it is smaller than the sum of its proper divisors (49754543328).

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

19452478752 is a wasteful number, since it uses less digits than its factorization.

19452478752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561 (or 1547 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 54.

The spelling of 19452478752 in words is "nineteen billion, four hundred fifty-two million, four hundred seventy-eight thousand, seven hundred fifty-two".