20216752865 has 16 divisors (see below), whose sum is σ = 25328160000. Its totient is φ = 15462101952.

The previous prime is 20216752847. The next prime is 20216752883. The reversal of 20216752865 is 56825761202.

It is an interprime number because it is at equal distance from previous prime (20216752847) and next prime (20216752883).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20216752865 is a prime.

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, 179036 + ... + 269234.

It is an arithmetic number, because the mean of its divisors is an integer number (1583010000).

Almost surely, 2^20216752865 is an apocalyptic number.

It is an amenable number.

20216752865 is a deficient number, since it is larger than the sum of its proper divisors (5111407135).

20216752865 is a wasteful number, since it uses less digits than its factorization.

20216752865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92176.

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 20216752865 in words is "twenty billion, two hundred sixteen million, seven hundred fifty-two thousand, eight hundred sixty-five".