21310603156 has 12 divisors (see below), whose sum is σ = 37997207892. Its totient is φ = 10454258048.

The previous prime is 21310603151. The next prime is 21310603163. The reversal of 21310603156 is 65130601312.

It can be written as a sum of positive squares in 2 ways, for example, as 7034176900 + 14276426256 = 83870^2 + 119484^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310603151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50260645 + ... + 50261068.

It is an arithmetic number, because the mean of its divisors is an integer number (3166433991).

Almost surely, 2^21310603156 is an apocalyptic number.

It is an amenable number.

21310603156 is a deficient number, since it is larger than the sum of its proper divisors (16686604736).

21310603156 is a wasteful number, since it uses less digits than its factorization.

21310603156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100521770 (or 100521768 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The spelling of 21310603156 in words is "twenty-one billion, three hundred ten million, six hundred three thousand, one hundred fifty-six".