19660157892 has 72 divisors (see below), whose sum is σ = 54145516320. Its totient is φ = 6167882880.

The previous prime is 19660157873. The next prime is 19660157893. The reversal of 19660157892 is 29875106691.

19660157892 is a `hidden beast` number, since 1 + 9 + 6 + 60 + 1 + 578 + 9 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (19660157893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 283734 + ... + 346157.

It is an arithmetic number, because the mean of its divisors is an integer number (752021060).

Almost surely, 2^19660157892 is an apocalyptic number.

19660157892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19660157892 is an abundant number, since it is smaller than the sum of its proper divisors (34485358428).

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

19660157892 is a wasteful number, since it uses less digits than its factorization.

19660157892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629938 (or 629913 counting only the distinct ones).

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

The spelling of 19660157892 in words is "nineteen billion, six hundred sixty million, one hundred fifty-seven thousand, eight hundred ninety-two".