21224277366 has 32 divisors (see below), whose sum is σ = 43619048448. Its totient is φ = 6879880800.

The previous prime is 21224277359. The next prime is 21224277367. The reversal of 21224277366 is 66377242212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224277367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 408621 + ... + 457623.

It is an arithmetic number, because the mean of its divisors is an integer number (1363095264).

Almost surely, 2^21224277366 is an apocalyptic number.

21224277366 is an abundant number, since it is smaller than the sum of its proper divisors (22394771082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21224277366 is a wasteful number, since it uses less digits than its factorization.

21224277366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50996.

The product of its digits is 338688, while the sum is 42.

The spelling of 21224277366 in words is "twenty-one billion, two hundred twenty-four million, two hundred seventy-seven thousand, three hundred sixty-six".