22520075861 has 4 divisors (see below), whose sum is σ = 22521537900. Its totient is φ = 22518613824.

The previous prime is 22520075849. The next prime is 22520075867. The reversal of 22520075861 is 16857002522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16857002522 = 2 ⋅8428501261.

It can be written as a sum of positive squares in 2 ways, for example, as 9772311025 + 12747764836 = 98855^2 + 112906^2 .

It is a cyclic number.

It is not a de Polignac number, because 22520075861 - 2¹⁸ = 22519813717 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 (22520075867) 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, 707666 + ... + 738803.

It is an arithmetic number, because the mean of its divisors is an integer number (5630384475).

Almost surely, 2^22520075861 is an apocalyptic number.

It is an amenable number.

22520075861 is a deficient number, since it is larger than the sum of its proper divisors (1462039).

22520075861 is a wasteful number, since it uses less digits than its factorization.

22520075861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462038.

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 22520075861 in words is "twenty-two billion, five hundred twenty million, seventy-five thousand, eight hundred sixty-one".