21173032 has 16 divisors (see below), whose sum is σ = 40065300. Its totient is φ = 10488960.

The previous prime is 21173029. The next prime is 21173057. The reversal of 21173032 is 23037112.

It can be written as a sum of positive squares in 2 ways, for example, as 18096516 + 3076516 = 4254^2 + 1754^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11269 + ... + 13012.

Almost surely, 2^21173032 is an apocalyptic number.

It is an amenable number.

21173032 is a deficient number, since it is larger than the sum of its proper divisors (18892268).

21173032 is a wasteful number, since it uses less digits than its factorization.

21173032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24396 (or 24392 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 21173032 is about 4601.4163037048. The cubic root of 21173032 is about 276.6480953970.

The spelling of 21173032 in words is "twenty-one million, one hundred seventy-three thousand, thirty-two".