21552174634 has 8 divisors (see below), whose sum is σ = 32329171620. Its totient is φ = 10775784096.

The previous prime is 21552174619. The next prime is 21552174653. The reversal of 21552174634 is 43647125512.

It can be written as a sum of positive squares in 2 ways, for example, as 21140287609 + 411887025 = 145397^2 + 20295^2 .

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, 48829 + ... + 213280.

Almost surely, 2^21552174634 is an apocalyptic number.

21552174634 is a deficient number, since it is larger than the sum of its proper divisors (10776996986).

21552174634 is a wasteful number, since it uses less digits than its factorization.

21552174634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303224.

The product of its digits is 201600, while the sum is 40.

The spelling of 21552174634 in words is "twenty-one billion, five hundred fifty-two million, one hundred seventy-four thousand, six hundred thirty-four".