21226504254 has 16 divisors (see below), whose sum is σ = 42575355648. Its totient is φ = 7055110232.

The previous prime is 21226504253. The next prime is 21226504259. The reversal of 21226504254 is 45240562212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21226504253) 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, 5095542 + ... + 5099705.

It is an arithmetic number, because the mean of its divisors is an integer number (2660959728).

Almost surely, 2^21226504254 is an apocalyptic number.

21226504254 is an abundant number, since it is smaller than the sum of its proper divisors (21348851394).

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

21226504254 is a wasteful number, since it uses less digits than its factorization.

21226504254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10195599.

The product of its (nonzero) digits is 38400, while the sum is 33.

The spelling of 21226504254 in words is "twenty-one billion, two hundred twenty-six million, five hundred four thousand, two hundred fifty-four".