19904252480 has 112 divisors (see below), whose sum is σ = 54340816896. Its totient is φ = 6802544640.

The previous prime is 19904252471. The next prime is 19904252483. The reversal of 19904252480 is 8425240991.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (19904252483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 696065 + ... + 724095.

Almost surely, 2^19904252480 is an apocalyptic number.

19904252480 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 19904252480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27170408448).

19904252480 is an abundant number, since it is smaller than the sum of its proper divisors (34436564416).

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

19904252480 is a wasteful number, since it uses less digits than its factorization.

19904252480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28372 (or 28362 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 19904252480 in words is "nineteen billion, nine hundred four million, two hundred fifty-two thousand, four hundred eighty".