19972707973632 has 120 divisors (see below), whose sum is σ = 57644794247040. Its totient is φ = 6657314457600.

The previous prime is 19972707973613. The next prime is 19972707973661. The reversal of 19972707973632 is 23637970727991.

19972707973632 is a `hidden beast` number, since 199 + 7 + 2 + 7 + 0 + 79 + 7 + 363 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149596507 + ... + 149729957.

It is an arithmetic number, because the mean of its divisors is an integer number (480373285392).

Almost surely, 2^{19972707973632} is an apocalyptic number.

19972707973632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19972707973632 is an abundant number, since it is smaller than the sum of its proper divisors (37672086273408).

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

19972707973632 is a wasteful number, since it uses less digits than its factorization.

19972707973632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165954 (or 165935 counting only the distinct ones).

The product of its (nonzero) digits is 378071064, while the sum is 72.

The spelling of 19972707973632 in words is "nineteen trillion, nine hundred seventy-two billion, seven hundred seven million, nine hundred seventy-three thousand, six hundred thirty-two".