21130242044 has 12 divisors (see below), whose sum is σ = 38253024600. Its totient is φ = 10200806448.

The previous prime is 21130242013. The next prime is 21130242113. The reversal of 21130242044 is 44024203112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91078514 + ... + 91078745.

It is an arithmetic number, because the mean of its divisors is an integer number (3187752050).

Almost surely, 2^21130242044 is an apocalyptic number.

It is an amenable number.

21130242044 is a deficient number, since it is larger than the sum of its proper divisors (17122782556).

21130242044 is a wasteful number, since it uses less digits than its factorization.

21130242044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182157292 (or 182157290 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21130242044 its reverse (44024203112), we get a palindrome (65154445156).

The spelling of 21130242044 in words is "twenty-one billion, one hundred thirty million, two hundred forty-two thousand, forty-four".