20658430631 has 8 divisors (see below), whose sum is σ = 21229868880. Its totient is φ = 20087682048.

The previous prime is 20658430627. The next prime is 20658430657. The reversal of 20658430631 is 13603485602.

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 20658430631 - 2² = 20658430627 is a prime.

It is a super-2 number, since 2×20658430631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20658430231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111386 + ... + 231783.

It is an arithmetic number, because the mean of its divisors is an integer number (2653733610).

Almost surely, 2^20658430631 is an apocalyptic number.

20658430631 is a deficient number, since it is larger than the sum of its proper divisors (571438249).

20658430631 is a wasteful number, since it uses less digits than its factorization.

20658430631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344833.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 20658430631 in words is "twenty billion, six hundred fifty-eight million, four hundred thirty thousand, six hundred thirty-one".