21314001504 has 24 divisors (see below), whose sum is σ = 55949254200. Its totient is φ = 7104667136.

The previous prime is 21314001493. The next prime is 21314001523. The reversal of 21314001504 is 40510041312.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×21314001504² (a number of 21 digits) contains 22 as substring.

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, 111010329 + ... + 111010520.

It is an arithmetic number, because the mean of its divisors is an integer number (2331218925).

Almost surely, 2^21314001504 is an apocalyptic number.

21314001504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21314001504 is an abundant number, since it is smaller than the sum of its proper divisors (34635252696).

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

21314001504 is a wasteful number, since it uses less digits than its factorization.

21314001504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222020862 (or 222020854 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21314001504 its reverse (40510041312), we get a palindrome (61824042816).

The spelling of 21314001504 in words is "twenty-one billion, three hundred fourteen million, one thousand, five hundred four".