21303546372 has 96 divisors (see below), whose sum is σ = 56877004800. Its totient is φ = 6891436800.

The previous prime is 21303546371. The next prime is 21303546389. The reversal of 21303546372 is 27364530312.

21303546372 is a `hidden beast` number, since 2 + 13 + 0 + 3 + 5 + 4 + 637 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (21303546371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 833154 + ... + 858342.

It is an arithmetic number, because the mean of its divisors is an integer number (592468800).

Almost surely, 2^21303546372 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 21303546372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28438502400).

21303546372 is an abundant number, since it is smaller than the sum of its proper divisors (35573458428).

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

21303546372 is a wasteful number, since it uses less digits than its factorization.

21303546372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25434 (or 25426 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The spelling of 21303546372 in words is "twenty-one billion, three hundred three million, five hundred forty-six thousand, three hundred seventy-two".