22735487721 has 16 divisors (see below), whose sum is σ = 30466077824. Its totient is φ = 15081099264.

The previous prime is 22735487713. The next prime is 22735487743. The reversal of 22735487721 is 12778453722.

It is not a de Polignac number, because 22735487721 - 2³ = 22735487713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22735987721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 585321 + ... + 622953.

It is an arithmetic number, because the mean of its divisors is an integer number (1904129864).

Almost surely, 2^22735487721 is an apocalyptic number.

It is an amenable number.

22735487721 is a deficient number, since it is larger than the sum of its proper divisors (7730590103).

22735487721 is a wasteful number, since it uses less digits than its factorization.

22735487721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38640.

The product of its digits is 1317120, while the sum is 48.

The spelling of 22735487721 in words is "twenty-two billion, seven hundred thirty-five million, four hundred eighty-seven thousand, seven hundred twenty-one".