21227022364 has 24 divisors (see below), whose sum is σ = 37286766720. Its totient is φ = 10573719024.

The previous prime is 21227022329. The next prime is 21227022379. The reversal of 21227022364 is 46322072212.

It is a super-2 number, since 2×21227022364² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1606047 + ... + 1619209.

It is an arithmetic number, because the mean of its divisors is an integer number (1553615280).

Almost surely, 2^21227022364 is an apocalyptic number.

It is an amenable number.

21227022364 is a deficient number, since it is larger than the sum of its proper divisors (16059744356).

21227022364 is a wasteful number, since it uses less digits than its factorization.

21227022364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14649 (or 14647 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

Adding to 21227022364 its reverse (46322072212), we get a palindrome (67549094576).

The spelling of 21227022364 in words is "twenty-one billion, two hundred twenty-seven million, twenty-two thousand, three hundred sixty-four".