22720521907 has 8 divisors (see below), whose sum is σ = 22979650320. Its totient is φ = 22461479040.

The previous prime is 22720521899. The next prime is 22720521919. The reversal of 22720521907 is 70912502722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22720521907 - 2³ = 22720521899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22720521997) 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, 622432 + ... + 657922.

It is an arithmetic number, because the mean of its divisors is an integer number (2872456290).

Almost surely, 2^22720521907 is an apocalyptic number.

22720521907 is a deficient number, since it is larger than the sum of its proper divisors (259128413).

22720521907 is an equidigital number, since it uses as much as digits as its factorization.

22720521907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42773.

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 22720521907 in words is "twenty-two billion, seven hundred twenty million, five hundred twenty-one thousand, nine hundred seven".