20344663156164 has 24 divisors (see below), whose sum is σ = 47478343677408. Its totient is φ = 6780488245440.

The previous prime is 20344663156141. The next prime is 20344663156171. The reversal of 20344663156164 is 46165136644302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133187982 + ... + 133340645.

It is an arithmetic number, because the mean of its divisors is an integer number (1978264319892).

Almost surely, 2^{20344663156164} is an apocalyptic number.

It is an amenable number.

20344663156164 is an abundant number, since it is smaller than the sum of its proper divisors (27133680521244).

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

20344663156164 is a wasteful number, since it uses less digits than its factorization.

20344663156164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266534995 (or 266534993 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 51.

The spelling of 20344663156164 in words is "twenty trillion, three hundred forty-four billion, six hundred sixty-three million, one hundred fifty-six thousand, one hundred sixty-four".