21304314231524 has 24 divisors (see below), whose sum is σ = 39413221979040. Its totient is φ = 10048206026304.

The previous prime is 21304314231517. The next prime is 21304314231527. The reversal of 21304314231524 is 42513241340312.

It is not an unprimeable number, because it can be changed into a prime (21304314231527) 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, 601527194 + ... + 601562609.

It is an arithmetic number, because the mean of its divisors is an integer number (1642217582460).

Almost surely, 2^{21304314231524} is an apocalyptic number.

It is an amenable number.

21304314231524 is a deficient number, since it is larger than the sum of its proper divisors (18108907747516).

21304314231524 is a wasteful number, since it uses less digits than its factorization.

21304314231524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203090059 (or 1203090057 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 21304314231524 its reverse (42513241340312), we get a palindrome (63817555571836).

The spelling of 21304314231524 in words is "twenty-one trillion, three hundred four billion, three hundred fourteen million, two hundred thirty-one thousand, five hundred twenty-four".