21464352504 has 96 divisors (see below), whose sum is σ = 67373130240. Its totient is φ = 6046286400.

The previous prime is 21464352461. The next prime is 21464352529. The reversal of 21464352504 is 40525346412.

21464352504 is a `hidden beast` number, since 2 + 1 + 4 + 643 + 5 + 2 + 5 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264132 + ... + 335699.

It is an arithmetic number, because the mean of its divisors is an integer number (701803440).

Almost surely, 2^21464352504 is an apocalyptic number.

21464352504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21464352504 is an abundant number, since it is smaller than the sum of its proper divisors (45908777736).

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

21464352504 is a wasteful number, since it uses less digits than its factorization.

21464352504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599921 (or 599914 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 21464352504 its reverse (40525346412), we get a palindrome (61989698916).

The spelling of 21464352504 in words is "twenty-one billion, four hundred sixty-four million, three hundred fifty-two thousand, five hundred four".