22742533621 has 4 divisors (see below), whose sum is σ = 22742945100. Its totient is φ = 22742122144.

The previous prime is 22742533603. The next prime is 22742533643. The reversal of 22742533621 is 12633524722.

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 10264526596 + 12478007025 = 101314^2 + 111705^2 .

It is a cyclic number.

It is not a de Polignac number, because 22742533621 - 2¹⁵ = 22742500853 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 (22742533651) 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, 107056 + ... + 238633.

It is an arithmetic number, because the mean of its divisors is an integer number (5685736275).

Almost surely, 2^22742533621 is an apocalyptic number.

It is an amenable number.

22742533621 is a deficient number, since it is larger than the sum of its proper divisors (411479).

22742533621 is an equidigital number, since it uses as much as digits as its factorization.

22742533621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411478.

The product of its digits is 120960, while the sum is 37.

The spelling of 22742533621 in words is "twenty-two billion, seven hundred forty-two million, five hundred thirty-three thousand, six hundred twenty-one".