21271664362 has 32 divisors (see below), whose sum is σ = 35231765184. Its totient is φ = 9569596800.

The previous prime is 21271664329. The next prime is 21271664389. The reversal of 21271664362 is 26346617212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1256937 + ... + 1273747.

It is an arithmetic number, because the mean of its divisors is an integer number (1100992662).

Almost surely, 2^21271664362 is an apocalyptic number.

21271664362 is a deficient number, since it is larger than the sum of its proper divisors (13960100822).

21271664362 is a wasteful number, since it uses less digits than its factorization.

21271664362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18054.

The product of its digits is 145152, while the sum is 40.

The spelling of 21271664362 in words is "twenty-one billion, two hundred seventy-one million, six hundred sixty-four thousand, three hundred sixty-two".