21310500034 has 16 divisors (see below), whose sum is σ = 32434186680. Its totient is φ = 10499379840.

The previous prime is 21310500023. The next prime is 21310500037. The reversal of 21310500034 is 43000501312.

It can be written as a sum of positive squares in 4 ways, for example, as 13491519409 + 7818980625 = 116153^2 + 88425^2 .

It is a super-2 number, since 2×21310500034² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21310499984 and 21310500020.

It is not an unprimeable number, because it can be changed into a prime (21310500037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87804 + ... + 224344.

Almost surely, 2^21310500034 is an apocalyptic number.

21310500034 is a deficient number, since it is larger than the sum of its proper divisors (11123686646).

21310500034 is a wasteful number, since it uses less digits than its factorization.

21310500034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137685.

The product of its (nonzero) digits is 360, while the sum is 19.

The spelling of 21310500034 in words is "twenty-one billion, three hundred ten million, five hundred thousand, thirty-four".