21373530234530 has 16 divisors (see below), whose sum is σ = 38474554539960. Its totient is φ = 8548923178752.

The previous prime is 21373530234491. The next prime is 21373530234547. The reversal of 21373530234530 is 3543203537312.

It can be written as a sum of positive squares in 4 ways, for example, as 11847412188049 + 9526118046481 = 3442007^2 + 3086441^2 .

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, 60930749 + ... + 61280528.

Almost surely, 2^{21373530234530} is an apocalyptic number.

21373530234530 is a deficient number, since it is larger than the sum of its proper divisors (17101024305430).

21373530234530 is a wasteful number, since it uses less digits than its factorization.

21373530234530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122228773.

The product of its (nonzero) digits is 680400, while the sum is 41.

The spelling of 21373530234530 in words is "twenty-one trillion, three hundred seventy-three billion, five hundred thirty million, two hundred thirty-four thousand, five hundred thirty".