21827906626 has 4 divisors (see below), whose sum is σ = 32741859942. Its totient is φ = 10913953312.

The previous prime is 21827906603. The next prime is 21827906669. The reversal of 21827906626 is 62660972812.

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., 15240149401 + 6587757225 = 123451^2 + 81165^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21827906626.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5456976655 + ... + 5456976658.

Almost surely, 2^21827906626 is an apocalyptic number.

21827906626 is a deficient number, since it is larger than the sum of its proper divisors (10913953316).

21827906626 is a wasteful number, since it uses less digits than its factorization.

21827906626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10913953315.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 21827906626 in words is "twenty-one billion, eight hundred twenty-seven million, nine hundred six thousand, six hundred twenty-six".