21658352332 has 24 divisors (see below), whose sum is σ = 38738618352. Its totient is φ = 10592760000.

The previous prime is 21658352327. The next prime is 21658352333. The reversal of 21658352332 is 23325385612.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21658352333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289419 + ... + 356482.

It is an arithmetic number, because the mean of its divisors is an integer number (1614109098).

Almost surely, 2^21658352332 is an apocalyptic number.

It is an amenable number.

21658352332 is a deficient number, since it is larger than the sum of its proper divisors (17080266020).

21658352332 is a wasteful number, since it uses less digits than its factorization.

21658352332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646089 (or 646087 counting only the distinct ones).

The product of its digits is 259200, while the sum is 40.

The spelling of 21658352332 in words is "twenty-one billion, six hundred fifty-eight million, three hundred fifty-two thousand, three hundred thirty-two".