21226254132 has 24 divisors (see below), whose sum is σ = 50018304672. Its totient is φ = 7005364000.

The previous prime is 21226254109. The next prime is 21226254139. The reversal of 21226254132 is 23145262212.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21226254132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21226254139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8755494 + ... + 8757917.

It is an arithmetic number, because the mean of its divisors is an integer number (2084096028).

Almost surely, 2^21226254132 is an apocalyptic number.

It is an amenable number.

21226254132 is an abundant number, since it is smaller than the sum of its proper divisors (28792050540).

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

21226254132 is a wasteful number, since it uses less digits than its factorization.

21226254132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17513519 (or 17513517 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The spelling of 21226254132 in words is "twenty-one billion, two hundred twenty-six million, two hundred fifty-four thousand, one hundred thirty-two".