21223621232 has 40 divisors (see below), whose sum is σ = 46405891440. Its totient is φ = 9314439680.

The previous prime is 21223621229. The next prime is 21223621247. The reversal of 21223621232 is 23212632212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2074013 + ... + 2084220.

It is an arithmetic number, because the mean of its divisors is an integer number (1160147286).

Almost surely, 2^21223621232 is an apocalyptic number.

21223621232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21223621232 is an abundant number, since it is smaller than the sum of its proper divisors (25182270208).

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

21223621232 is a wasteful number, since it uses less digits than its factorization.

21223621232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4158281 (or 4158275 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The spelling of 21223621232 in words is "twenty-one billion, two hundred twenty-three million, six hundred twenty-one thousand, two hundred thirty-two".