21473392506952 has 32 divisors (see below), whose sum is σ = 40312865993400. Its totient is φ = 10723296950784.

The previous prime is 21473392506941. The next prime is 21473392506967. The reversal of 21473392506952 is 25960529337412.

It can be written as a sum of positive squares in 4 ways, for example, as 13819018151236 + 7654374355716 = 3717394^2 + 2766654^2 .

It is a super-2 number, since 2×21473392506952² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 88822174 + ... + 89063602.

Almost surely, 2^{21473392506952} is an apocalyptic number.

It is an amenable number.

21473392506952 is a deficient number, since it is larger than the sum of its proper divisors (18839473486448).

21473392506952 is a wasteful number, since it uses less digits than its factorization.

21473392506952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255265 (or 255261 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 58.

The spelling of 21473392506952 in words is "twenty-one trillion, four hundred seventy-three billion, three hundred ninety-two million, five hundred six thousand, nine hundred fifty-two".