21477600352 has 96 divisors (see below), whose sum is σ = 48277518912. Its totient is φ = 9317597184.

The previous prime is 21477600337. The next prime is 21477600377. The reversal of 21477600352 is 25300677412.

It is a happy number.

It is a super-2 number, since 2×21477600352² (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 15 ways as a sum of consecutive naturals, for example, 7516108 + ... + 7518964.

It is an arithmetic number, because the mean of its divisors is an integer number (502890822).

Almost surely, 2^21477600352 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 21477600352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24138759456).

21477600352 is an abundant number, since it is smaller than the sum of its proper divisors (26799918560).

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

21477600352 is a wasteful number, since it uses less digits than its factorization.

21477600352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3960 (or 3952 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 21477600352 in words is "twenty-one billion, four hundred seventy-seven million, six hundred thousand, three hundred fifty-two".