21232745226 has 48 divisors (see below), whose sum is σ = 57355990848. Its totient is φ = 5514998400.

The previous prime is 21232745189. The next prime is 21232745269. The reversal of 21232745226 is 62254723212.

21232745226 is a `hidden beast` number, since 2 + 123 + 2 + 7 + 4 + 522 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7658335 + ... + 7661106.

It is an arithmetic number, because the mean of its divisors is an integer number (1194916476).

Almost surely, 2^21232745226 is an apocalyptic number.

21232745226 is an abundant number, since it is smaller than the sum of its proper divisors (36123245622).

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

21232745226 is a wasteful number, since it uses less digits than its factorization.

21232745226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15319467 (or 15319464 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The spelling of 21232745226 in words is "twenty-one billion, two hundred thirty-two million, seven hundred forty-five thousand, two hundred twenty-six".