22020647561 has 8 divisors (see below), whose sum is σ = 24125628384. Its totient is φ = 19932850720.

The previous prime is 22020647549. The next prime is 22020647573. The reversal of 22020647561 is 16574602022.

It is an interprime number because it is at equal distance from previous prime (22020647549) and next prime (22020647573).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22020647561 - 2³⁴ = 4840778377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22020647521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4293311 + ... + 4298436.

It is an arithmetic number, because the mean of its divisors is an integer number (3015703548).

Almost surely, 2^22020647561 is an apocalyptic number.

It is an amenable number.

22020647561 is a deficient number, since it is larger than the sum of its proper divisors (2104980823).

22020647561 is a wasteful number, since it uses less digits than its factorization.

22020647561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8591991.

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 22020647561 in words is "twenty-two billion, twenty million, six hundred forty-seven thousand, five hundred sixty-one".