20124631 has 2 divisors, whose sum is σ = 20124632. Its totient is φ = 20124630.

The previous prime is 20124623. The next prime is 20124647. The reversal of 20124631 is 13642102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20124631 - 2³ = 20124623 is a prime.

It is a super-2 number, since 2×20124631² = 810001545772322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20124599 and 20124608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20124661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062315 + 10062316.

It is an arithmetic number, because the mean of its divisors is an integer number (10062316).

Almost surely, 2^20124631 is an apocalyptic number.

20124631 is a deficient number, since it is larger than the sum of its proper divisors (1).

20124631 is an equidigital number, since it uses as much as digits as its factorization.

20124631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20124631 is about 4486.0484839110. The cubic root of 20124631 is about 272.0044288134.

Adding to 20124631 its reverse (13642102), we get a palindrome (33766733).

The spelling of 20124631 in words is "twenty million, one hundred twenty-four thousand, six hundred thirty-one".