22720517629 has 4 divisors (see below), whose sum is σ = 24057018684. Its totient is φ = 21384016576.

The previous prime is 22720517627. The next prime is 22720517641. The reversal of 22720517629 is 92671502722.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15897427225 + 6823090404 = 126085^2 + 82602^2 .

It is not a de Polignac number, because 22720517629 - 2¹ = 22720517627 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22720517627) 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, 668250502 + ... + 668250535.

It is an arithmetic number, because the mean of its divisors is an integer number (6014254671).

Almost surely, 2^22720517629 is an apocalyptic number.

It is an amenable number.

22720517629 is a deficient number, since it is larger than the sum of its proper divisors (1336501055).

22720517629 is a wasteful number, since it uses less digits than its factorization.

22720517629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336501054.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 22720517629 in words is "twenty-two billion, seven hundred twenty million, five hundred seventeen thousand, six hundred twenty-nine".