19968836165712 has 150 divisors (see below), whose sum is σ = 67231622695578. Its totient is φ = 5705381743488.

The previous prime is 19968836165701. The next prime is 19968836165723. The reversal of 19968836165712 is 21756163886991.

19968836165712 is a `hidden beast` number, since 1 + 9 + 9 + 6 + 8 + 8 + 36 + 16 + 571 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (19968836165701) and next prime (19968836165723).

It can be written as a sum of positive squares in only one way, i.e., 13941889725456 + 6026946440256 = 3733884^2 + 2454984^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 157161523 + ... + 157288530.

Almost surely, 2^{19968836165712} is an apocalyptic number.

19968836165712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19968836165712 is an abundant number, since it is smaller than the sum of its proper divisors (47262786529866).

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

19968836165712 is a wasteful number, since it uses less digits than its factorization.

19968836165712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314450087 (or 314450065 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 72.

The spelling of 19968836165712 in words is "nineteen trillion, nine hundred sixty-eight billion, eight hundred thirty-six million, one hundred sixty-five thousand, seven hundred twelve".