21073633562 has 8 divisors (see below), whose sum is σ = 31614376692. Its totient is φ = 10535508000.

The previous prime is 21073633549. The next prime is 21073633573. The reversal of 21073633562 is 26533637012.

It can be written as a sum of positive squares in 2 ways, for example, as 14999145841 + 6074487721 = 122471^2 + 77939^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634139 + ... + 666542.

Almost surely, 2^21073633562 is an apocalyptic number.

21073633562 is a deficient number, since it is larger than the sum of its proper divisors (10540743130).

21073633562 is a wasteful number, since it uses less digits than its factorization.

21073633562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308784.

The product of its (nonzero) digits is 136080, while the sum is 38.

The spelling of 21073633562 in words is "twenty-one billion, seventy-three million, six hundred thirty-three thousand, five hundred sixty-two".