22005512420 has 24 divisors (see below), whose sum is σ = 46238942904. Its totient is φ = 8796992256.

The previous prime is 22005512401. The next prime is 22005512483. The reversal of 22005512420 is 2421550022.

It can be written as a sum of positive squares in 4 ways, for example, as 6631496356 + 15374016064 = 81434^2 + 123992^2 .

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, 291089 + ... + 358808.

It is an arithmetic number, because the mean of its divisors is an integer number (1926622621).

Almost surely, 2^22005512420 is an apocalyptic number.

22005512420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22005512420 is an abundant number, since it is smaller than the sum of its proper divisors (24233430484).

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

22005512420 is a wasteful number, since it uses less digits than its factorization.

22005512420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651599 (or 651597 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The spelling of 22005512420 in words is "twenty-two billion, five million, five hundred twelve thousand, four hundred twenty".