20215197630 has 48 divisors (see below), whose sum is σ = 55325808720. Its totient is φ = 5106996864.

The previous prime is 20215197623. The next prime is 20215197637. The reversal of 20215197630 is 3679151202.

20215197630 is a `hidden beast` number, since 2 + 0 + 2 + 1 + 5 + 19 + 7 + 630 = 666.

It is an interprime number because it is at equal distance from previous prime (20215197623) and next prime (20215197637).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20215197637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5909167 + ... + 5912586.

It is an arithmetic number, because the mean of its divisors is an integer number (1152621015).

Almost surely, 2^20215197630 is an apocalyptic number.

20215197630 is an abundant number, since it is smaller than the sum of its proper divisors (35110611090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20215197630 is a wasteful number, since it uses less digits than its factorization.

20215197630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11821785 (or 11821782 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 20215197630 in words is "twenty billion, two hundred fifteen million, one hundred ninety-seven thousand, six hundred thirty".