20041631 has 4 divisors (see below), whose sum is σ = 20119872. Its totient is φ = 19963392.

The previous prime is 20041627. The next prime is 20041633. The reversal of 20041631 is 13614002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20041631 - 2² = 20041627 is a prime.

It is a super-2 number, since 2×20041631² = 803333946280322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20041633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38735 + ... + 39248.

It is an arithmetic number, because the mean of its divisors is an integer number (5029968).

Almost surely, 2^20041631 is an apocalyptic number.

20041631 is a deficient number, since it is larger than the sum of its proper divisors (78241).

20041631 is an equidigital number, since it uses as much as digits as its factorization.

20041631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78240.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 20041631 is about 4476.7880226788. The cubic root of 20041631 is about 271.6299709971.

Adding to 20041631 its reverse (13614002), we get a palindrome (33655633).

The spelling of 20041631 in words is "twenty million, forty-one thousand, six hundred thirty-one".