20613570761 has 8 divisors (see below), whose sum is σ = 24582643584. Its totient is φ = 16900567200.

The previous prime is 20613570749. The next prime is 20613570799. The reversal of 20613570761 is 16707531602.

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 20613570761 - 2³⁰ = 19539828937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20613578761) 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, 64017140 + ... + 64017461.

It is an arithmetic number, because the mean of its divisors is an integer number (3072830448).

Almost surely, 2^20613570761 is an apocalyptic number.

It is an amenable number.

20613570761 is a deficient number, since it is larger than the sum of its proper divisors (3969072823).

20613570761 is a wasteful number, since it uses less digits than its factorization.

20613570761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128034631.

The product of its (nonzero) digits is 52920, while the sum is 38.

The spelling of 20613570761 in words is "twenty billion, six hundred thirteen million, five hundred seventy thousand, seven hundred sixty-one".