21323055024 has 60 divisors (see below), whose sum is σ = 59700961632. Its totient is φ = 7104585600.

The previous prime is 21323055023. The next prime is 21323055037. The reversal of 21323055024 is 42055032312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21323055023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 311769 + ... + 373959.

Almost surely, 2^21323055024 is an apocalyptic number.

21323055024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21323055024 is an abundant number, since it is smaller than the sum of its proper divisors (38377906608).

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

21323055024 is a wasteful number, since it uses less digits than its factorization.

21323055024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64586 (or 64577 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 21323055024 its reverse (42055032312), we get a palindrome (63378087336).

The spelling of 21323055024 in words is "twenty-one billion, three hundred twenty-three million, fifty-five thousand, twenty-four".