20358000661 has 8 divisors (see below), whose sum is σ = 21441265920. Its totient is φ = 19275914592.

The previous prime is 20358000653. The next prime is 20358000679. The reversal of 20358000661 is 16600085302.

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 20358000661 - 2³ = 20358000653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20358000631) 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, 259240 + ... + 328513.

It is an arithmetic number, because the mean of its divisors is an integer number (2680158240).

Almost surely, 2^20358000661 is an apocalyptic number.

It is an amenable number.

20358000661 is a deficient number, since it is larger than the sum of its proper divisors (1083265259).

20358000661 is a wasteful number, since it uses less digits than its factorization.

20358000661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589595.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 20358000661 its reverse (16600085302), we get a palindrome (36958085963).

The spelling of 20358000661 in words is "twenty billion, three hundred fifty-eight million, six hundred sixty-one", and thus it is an aban number.