21551300995034 has 4 divisors (see below), whose sum is σ = 32326951492554. Its totient is φ = 10775650497516.

The previous prime is 21551300995001. The next prime is 21551300995069. The reversal of 21551300995034 is 43059900315512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10839917514409 + 10711383480625 = 3292403^2 + 3272825^2 .

It is a super-2 number, since 2×21551300995034² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21551300995034.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5387825248757 + ... + 5387825248760.

Almost surely, 2^{21551300995034} is an apocalyptic number.

21551300995034 is a deficient number, since it is larger than the sum of its proper divisors (10775650497520).

21551300995034 is a wasteful number, since it uses less digits than its factorization.

21551300995034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10775650497519.

The product of its (nonzero) digits is 729000, while the sum is 47.

The spelling of 21551300995034 in words is "twenty-one trillion, five hundred fifty-one billion, three hundred million, nine hundred ninety-five thousand, thirty-four".