21274042422 has 16 divisors (see below), whose sum is σ = 42589048320. Its totient is φ = 7084520232.

The previous prime is 21274042381. The next prime is 21274042453. The reversal of 21274042422 is 22424047212.

It is a self number, because there is not a number n which added to its sum of digits gives 21274042422.

It is a congruent number.

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, 1700058 + ... + 1712525.

It is an arithmetic number, because the mean of its divisors is an integer number (2661815520).

Almost surely, 2^21274042422 is an apocalyptic number.

21274042422 is an abundant number, since it is smaller than the sum of its proper divisors (21315005898).

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

21274042422 is a wasteful number, since it uses less digits than its factorization.

21274042422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3413627.

The product of its (nonzero) digits is 14336, while the sum is 30.

Adding to 21274042422 its reverse (22424047212), we get a palindrome (43698089634).

The spelling of 21274042422 in words is "twenty-one billion, two hundred seventy-four million, forty-two thousand, four hundred twenty-two".