20311630002 has 48 divisors (see below), whose sum is σ = 46421856000. Its totient is φ = 6400756512.

The previous prime is 20311629991. The next prime is 20311630007. The reversal of 20311630002 is 20003611302.

20311630002 is a `hidden beast` number, since 2 + 0 + 31 + 1 + 630 + 0 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20311630007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101824 + ... + 225812.

It is an arithmetic number, because the mean of its divisors is an integer number (967122000).

Almost surely, 2^20311630002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20311630002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23210928000).

20311630002 is an abundant number, since it is smaller than the sum of its proper divisors (26110225998).

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

20311630002 is a wasteful number, since it uses less digits than its factorization.

20311630002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124495 (or 124492 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The spelling of 20311630002 in words is "twenty billion, three hundred eleven million, six hundred thirty thousand, two".