21134426204 has 24 divisors (see below), whose sum is σ = 38204812800. Its totient is φ = 10219238640.

The previous prime is 21134426191. The next prime is 21134426213. The reversal of 21134426204 is 40262443112.

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, 122507 + ... + 239325.

It is an arithmetic number, because the mean of its divisors is an integer number (1591867200).

Almost surely, 2^21134426204 is an apocalyptic number.

It is an amenable number.

21134426204 is a deficient number, since it is larger than the sum of its proper divisors (17070386596).

21134426204 is a wasteful number, since it uses less digits than its factorization.

21134426204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118313 (or 118311 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21134426204 its reverse (40262443112), we get a palindrome (61396869316).

The spelling of 21134426204 in words is "twenty-one billion, one hundred thirty-four million, four hundred twenty-six thousand, two hundred four".