21363183232 has 16 divisors (see below), whose sum is σ = 42559466850. Its totient is φ = 10681591552.

The previous prime is 21363183223. The next prime is 21363183241. The reversal of 21363183232 is 23238136312.

It is an interprime number because it is at equal distance from previous prime (21363183223) and next prime (21363183241).

It can be written as a sum of positive squares in only one way, i.e., 18589686336 + 2773496896 = 136344^2 + 52664^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83449807 + ... + 83450062.

Almost surely, 2^21363183232 is an apocalyptic number.

It is an amenable number.

21363183232 is a deficient number, since it is larger than the sum of its proper divisors (21196283618).

21363183232 is an equidigital number, since it uses as much as digits as its factorization.

21363183232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166899883 (or 166899871 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The spelling of 21363183232 in words is "twenty-one billion, three hundred sixty-three million, one hundred eighty-three thousand, two hundred thirty-two".