22038785521 has 4 divisors (see below), whose sum is σ = 22063745392. Its totient is φ = 22013825652.

The previous prime is 22038785519. The next prime is 22038785569. The reversal of 22038785521 is 12558783022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22038785521 - 2¹ = 22038785519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22038785581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12478611 + ... + 12480376.

It is an arithmetic number, because the mean of its divisors is an integer number (5515936348).

Almost surely, 2^22038785521 is an apocalyptic number.

It is an amenable number.

22038785521 is a deficient number, since it is larger than the sum of its proper divisors (24959871).

22038785521 is an equidigital number, since it uses as much as digits as its factorization.

22038785521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24959870.

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 22038785521 in words is "twenty-two billion, thirty-eight million, seven hundred eighty-five thousand, five hundred twenty-one".