20657151579 has 16 divisors (see below), whose sum is σ = 27638711424. Its totient is φ = 13723564800.

The previous prime is 20657151527. The next prime is 20657151583. The reversal of 20657151579 is 97515175602.

It is not a de Polignac number, because 20657151579 - 2²⁸ = 20388716123 is a prime.

It is a super-2 number, since 2×20657151579² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20657151589) by changing a digit.

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, 1912464 + ... + 1923234.

It is an arithmetic number, because the mean of its divisors is an integer number (1727419464).

Almost surely, 2^20657151579 is an apocalyptic number.

20657151579 is a deficient number, since it is larger than the sum of its proper divisors (6981559845).

20657151579 is a wasteful number, since it uses less digits than its factorization.

20657151579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12938.

The product of its (nonzero) digits is 661500, while the sum is 48.

The spelling of 20657151579 in words is "twenty billion, six hundred fifty-seven million, one hundred fifty-one thousand, five hundred seventy-nine".