19748551680 has 1232 divisors, whose sum is σ = 85700258784. Its totient is φ = 4299816960.

The previous prime is 19748551679. The next prime is 19748551681. The reversal of 19748551680 is 8615584791.

It is a happy number.

19748551680 is a `hidden beast` number, since 1 + 9 + 7 + 4 + 8 + 551 + 6 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (19748551679) and next prime (19748551681).

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 (19748551681) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 533744622 + ... + 533744658.

Almost surely, 2^19748551680 is an apocalyptic number.

19748551680 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 19748551680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42850129392).

19748551680 is an abundant number, since it is smaller than the sum of its proper divisors (65951707104).

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

19748551680 is a wasteful number, since it uses less digits than its factorization.

19748551680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 19748551680 in words is "nineteen billion, seven hundred forty-eight million, five hundred fifty-one thousand, six hundred eighty".