21476868688457 has 32 divisors (see below), whose sum is σ = 26452623859200. Its totient is φ = 16980120880128.

The previous prime is 21476868688283. The next prime is 21476868688469. The reversal of 21476868688457 is 75488686867412.

It is not a de Polignac number, because 21476868688457 - 2¹⁸ = 21476868426313 is a prime.

It is a super-2 number, since 2×21476868688457² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21476868688487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 893777519 + ... + 893801547.

It is an arithmetic number, because the mean of its divisors is an integer number (826644495600).

Almost surely, 2^{21476868688457} is an apocalyptic number.

It is an amenable number.

21476868688457 is a deficient number, since it is larger than the sum of its proper divisors (4975755170743).

21476868688457 is a wasteful number, since it uses less digits than its factorization.

21476868688457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30905.

The product of its digits is 6936330240, while the sum is 80.

The spelling of 21476868688457 in words is "twenty-one trillion, four hundred seventy-six billion, eight hundred sixty-eight million, six hundred eighty-eight thousand, four hundred fifty-seven".