15738891020 has 48 divisors (see below), whose sum is σ = 34255267200. Its totient is φ = 6067111680.

The previous prime is 15738891017. The next prime is 15738891059. The reversal of 15738891020 is 2019883751.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288701 + ... + 338859.

It is an arithmetic number, because the mean of its divisors is an integer number (713651400).

Almost surely, 2^15738891020 is an apocalyptic number.

15738891020 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 15738891020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17127633600).

15738891020 is an abundant number, since it is smaller than the sum of its proper divisors (18516376180).

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

15738891020 is a wasteful number, since it uses less digits than its factorization.

15738891020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50738 (or 50736 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 15738891020 in words is "fifteen billion, seven hundred thirty-eight million, eight hundred ninety-one thousand, twenty".