20666757315 has 16 divisors (see below), whose sum is σ = 33117004800. Its totient is φ = 11005539552.

The previous prime is 20666757283. The next prime is 20666757323. The reversal of 20666757315 is 51375766602.

It is not a de Polignac number, because 20666757315 - 2⁵ = 20666757283 is a prime.

It is a super-2 number, since 2×20666757315² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1035475 + ... + 1055244.

It is an arithmetic number, because the mean of its divisors is an integer number (2069812800).

Almost surely, 2^20666757315 is an apocalyptic number.

20666757315 is a deficient number, since it is larger than the sum of its proper divisors (12450247485).

20666757315 is a wasteful number, since it uses less digits than its factorization.

20666757315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091386.

The product of its (nonzero) digits is 1587600, while the sum is 48.

The spelling of 20666757315 in words is "twenty billion, six hundred sixty-six million, seven hundred fifty-seven thousand, three hundred fifteen".