20024623661 has 8 divisors (see below), whose sum is σ = 23352331200. Its totient is φ = 17163962844.

The previous prime is 20024623651. The next prime is 20024623673. The reversal of 20024623661 is 16632642002.

It is a de Polignac number, because none of the positive numbers 2^k-20024623661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20024623651) 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, 29190071 + ... + 29190756.

It is an arithmetic number, because the mean of its divisors is an integer number (2919041400).

Almost surely, 2^20024623661 is an apocalyptic number.

It is an amenable number.

20024623661 is a deficient number, since it is larger than the sum of its proper divisors (3327707539).

20024623661 is an frugal number, since it uses more digits than its factorization.

20024623661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58380848 (or 58380834 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 20024623661 in words is "twenty billion, twenty-four million, six hundred twenty-three thousand, six hundred sixty-one".