20320002890964 has 144 divisors (see below), whose sum is σ = 58979142488448. Its totient is φ = 5778385323264.

The previous prime is 20320002890959. The next prime is 20320002890983. The reversal of 20320002890964 is 46909820002302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51167614 + ... + 51563210.

It is an arithmetic number, because the mean of its divisors is an integer number (409577378392).

Almost surely, 2^{20320002890964} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20320002890964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29489571244224).

20320002890964 is an abundant number, since it is smaller than the sum of its proper divisors (38659139597484).

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

20320002890964 is a wasteful number, since it uses less digits than its factorization.

20320002890964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396574 (or 396569 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 20320002890964 in words is "twenty trillion, three hundred twenty billion, two million, eight hundred ninety thousand, nine hundred sixty-four".