21222000432 has 80 divisors (see below), whose sum is σ = 60945965280. Its totient is φ = 7070404608.

The previous prime is 21222000407. The next prime is 21222000463. The reversal of 21222000432 is 23400022212.

21222000432 is a `hidden beast` number, since 2 + 12 + 220 + 0 + 0 + 432 = 666.

It is a super-4 number, since 4×21222000432⁴ (a number of 42 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 918688 + ... + 941504.

It is an arithmetic number, because the mean of its divisors is an integer number (761824566).

Almost surely, 2^21222000432 is an apocalyptic number.

It is an amenable number.

21222000432 is an abundant number, since it is smaller than the sum of its proper divisors (39723964848).

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

21222000432 is a wasteful number, since it uses less digits than its factorization.

21222000432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24987 (or 24975 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 21222000432 its reverse (23400022212), we get a palindrome (44622022644).

The spelling of 21222000432 in words is "twenty-one billion, two hundred twenty-two million, four hundred thirty-two", and thus it is an aban number.