20464266816 has 112 divisors (see below), whose sum is σ = 68755646080. Its totient is φ = 5846929920.

The previous prime is 20464266791. The next prime is 20464266821. The reversal of 20464266816 is 61866246402.

20464266816 is a `hidden beast` number, since 204 + 6 + 426 + 6 + 8 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 833815 + ... + 858006.

Almost surely, 2^20464266816 is an apocalyptic number.

It is an amenable number.

20464266816 is an abundant number, since it is smaller than the sum of its proper divisors (48291379264).

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

20464266816 is a wasteful number, since it uses less digits than its factorization.

20464266816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691849 (or 1691833 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 20464266816 in words is "twenty billion, four hundred sixty-four million, two hundred sixty-six thousand, eight hundred sixteen".