21477430752231 has 32 divisors (see below), whose sum is σ = 30354750053568. Its totient is φ = 13461072906240.

The previous prime is 21477430752179. The next prime is 21477430752233. The reversal of 21477430752231 is 13225703477412.

It is a happy number.

It is not a de Polignac number, because 21477430752231 - 2⁹ = 21477430751719 is a prime.

It is a super-2 number, since 2×21477430752231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21477430752233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 665723641 + ... + 665755901.

It is an arithmetic number, because the mean of its divisors is an integer number (948585939174).

Almost surely, 2^{21477430752231} is an apocalyptic number.

21477430752231 is a deficient number, since it is larger than the sum of its proper divisors (8877319301337).

21477430752231 is a wasteful number, since it uses less digits than its factorization.

21477430752231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46371.

The product of its (nonzero) digits is 1975680, while the sum is 48.

The spelling of 21477430752231 in words is "twenty-one trillion, four hundred seventy-seven billion, four hundred thirty million, seven hundred fifty-two thousand, two hundred thirty-one".