19885512256 has 21 divisors (see below), whose sum is σ = 39462552139. Its totient is φ = 9942192064.

The previous prime is 19885512223. The next prime is 19885512277. The reversal of 19885512256 is 65221558891.

The square root of 19885512256 is 141016.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1119315 + ... + 1136941.

Almost surely, 2^19885512256 is an apocalyptic number.

19885512256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

19885512256 is the 141016-th square number.

It is an amenable number.

19885512256 is a deficient number, since it is larger than the sum of its proper divisors (19577039883).

19885512256 is an frugal number, since it uses more digits than its factorization.

19885512256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35266 (or 17629 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 52.

The spelling of 19885512256 in words is "nineteen billion, eight hundred eighty-five million, five hundred twelve thousand, two hundred fifty-six".