20102631 has 8 divisors (see below), whose sum is σ = 26836080. Its totient is φ = 13385472.

The previous prime is 20102609. The next prime is 20102647. The reversal of 20102631 is 13620102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20102631 - 2⁶ = 20102567 is a prime.

It is a super-2 number, since 2×20102631² = 808231546244322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20102631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102671) 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, 820 + ... + 6393.

It is an arithmetic number, because the mean of its divisors is an integer number (3354510).

Almost surely, 2^20102631 is an apocalyptic number.

20102631 is a deficient number, since it is larger than the sum of its proper divisors (6733449).

20102631 is an equidigital number, since it uses as much as digits as its factorization.

20102631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8145.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 20102631 is about 4483.5957667925. The cubic root of 20102631 is about 271.9052753707.

Adding to 20102631 its reverse (13620102), we get a palindrome (33722733).

The spelling of 20102631 in words is "twenty million, one hundred two thousand, six hundred thirty-one".