20211630875 has 16 divisors (see below), whose sum is σ = 25528033440. Its totient is φ = 15974485600.

The previous prime is 20211630851. The next prime is 20211630877. The reversal of 20211630875 is 57803611202.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20211630875 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20211630877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 963680 + ... + 984429.

It is an arithmetic number, because the mean of its divisors is an integer number (1595502090).

Almost surely, 2^20211630875 is an apocalyptic number.

20211630875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20211630875 is a deficient number, since it is larger than the sum of its proper divisors (5316402565).

20211630875 is an equidigital number, since it uses as much as digits as its factorization.

20211630875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948207 (or 1948197 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 20211630875 in words is "twenty billion, two hundred eleven million, six hundred thirty thousand, eight hundred seventy-five".