20858731630 has 16 divisors (see below), whose sum is σ = 40958964144. Its totient is φ = 7584993280.

The previous prime is 20858731613. The next prime is 20858731631. The reversal of 20858731630 is 3613785802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20858731631) 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, 94812307 + ... + 94812526.

It is an arithmetic number, because the mean of its divisors is an integer number (2559935259).

Almost surely, 2^20858731630 is an apocalyptic number.

20858731630 is a deficient number, since it is larger than the sum of its proper divisors (20100232514).

20858731630 is a wasteful number, since it uses less digits than its factorization.

20858731630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189624851.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 20858731630 in words is "twenty billion, eight hundred fifty-eight million, seven hundred thirty-one thousand, six hundred thirty".