19669785120 has 96 divisors (see below), whose sum is σ = 68844263040. Its totient is φ = 5245274880.

The previous prime is 19669785119. The next prime is 19669785139. The reversal of 19669785120 is 2158796691.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 2272276 + ... + 2280915.

It is an arithmetic number, because the mean of its divisors is an integer number (717127740).

Almost surely, 2^19669785120 is an apocalyptic number.

19669785120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19669785120 is an abundant number, since it is smaller than the sum of its proper divisors (49174477920).

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

19669785120 is a wasteful number, since it uses less digits than its factorization.

19669785120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4553215 (or 4553201 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 19669785120 in words is "nineteen billion, six hundred sixty-nine million, seven hundred eighty-five thousand, one hundred twenty".