21274722242 has 16 divisors (see below), whose sum is σ = 32223048000. Its totient is φ = 10533816720.

The previous prime is 21274722169. The next prime is 21274722307. The reversal of 21274722242 is 24222747212.

It is a super-2 number, since 2×21274722242² (a number of 21 digits) contains 22 as substring.

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, 372509 + ... + 425807.

It is an arithmetic number, because the mean of its divisors is an integer number (2013940500).

Almost surely, 2^21274722242 is an apocalyptic number.

21274722242 is a deficient number, since it is larger than the sum of its proper divisors (10948325758).

21274722242 is a wasteful number, since it uses less digits than its factorization.

21274722242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55241.

The product of its digits is 50176, while the sum is 35.

The spelling of 21274722242 in words is "twenty-one billion, two hundred seventy-four million, seven hundred twenty-two thousand, two hundred forty-two".