21314503504 has 80 divisors (see below), whose sum is σ = 48376125952. Its totient is φ = 8907179904.

The previous prime is 21314503451. The next prime is 21314503517. The reversal of 21314503504 is 40530541312.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3093247 + ... + 3100129.

Almost surely, 2^21314503504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21314503504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24188062976).

21314503504 is an abundant number, since it is smaller than the sum of its proper divisors (27061622448).

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

21314503504 is a wasteful number, since it uses less digits than its factorization.

21314503504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7584 (or 7578 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 21314503504 in words is "twenty-one billion, three hundred fourteen million, five hundred three thousand, five hundred four".