19192919900 has 72 divisors (see below), whose sum is σ = 51925593216. Its totient is φ = 5982206400.

The previous prime is 19192919899. The next prime is 19192919927. The reversal of 19192919900 is 991929191.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1238594 + ... + 1253993.

Almost surely, 2^19192919900 is an apocalyptic number.

19192919900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19192919900 is an abundant number, since it is smaller than the sum of its proper divisors (32732673316).

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

19192919900 is a wasteful number, since it uses less digits than its factorization.

19192919900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492619 (or 2492612 counting only the distinct ones).

The product of its (nonzero) digits is 118098, while the sum is 50.

The spelling of 19192919900 in words is "nineteen billion, one hundred ninety-two million, nine hundred nineteen thousand, nine hundred".