21451514304 has 112 divisors (see below), whose sum is σ = 62555786496. Its totient is φ = 6433382400.

The previous prime is 21451514269. The next prime is 21451514317. The reversal of 21451514304 is 40341515412.

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, 152509 + ... + 257219.

It is an arithmetic number, because the mean of its divisors is an integer number (558533808).

Almost surely, 2^21451514304 is an apocalyptic number.

21451514304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21451514304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31277893248).

21451514304 is an abundant number, since it is smaller than the sum of its proper divisors (41104272192).

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

21451514304 is a wasteful number, since it uses less digits than its factorization.

21451514304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104834 (or 104824 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 21451514304 in words is "twenty-one billion, four hundred fifty-one million, five hundred fourteen thousand, three hundred four".