21113024524 has 24 divisors (see below), whose sum is σ = 38560663008. Its totient is φ = 10095845760.

The previous prime is 21113024521. The next prime is 21113024573. The reversal of 21113024524 is 42542031112.

It is not an unprimeable number, because it can be changed into a prime (21113024521) 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, 666894 + ... + 697834.

It is an arithmetic number, because the mean of its divisors is an integer number (1606694292).

Almost surely, 2^21113024524 is an apocalyptic number.

It is an amenable number.

21113024524 is a deficient number, since it is larger than the sum of its proper divisors (17447638484).

21113024524 is a wasteful number, since it uses less digits than its factorization.

21113024524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38385 (or 38383 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21113024524 its reverse (42542031112), we get a palindrome (63655055636).

The spelling of 21113024524 in words is "twenty-one billion, one hundred thirteen million, twenty-four thousand, five hundred twenty-four".