20341631 has 4 divisors (see below), whose sum is σ = 20599200. Its totient is φ = 20084064.

The previous prime is 20341627. The next prime is 20341649. The reversal of 20341631 is 13614302.

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 20341631 - 2² = 20341627 is a prime.

It is a super-2 number, since 2×20341631² = 827563903480322, 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 (20341661) 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, 128666 + ... + 128823.

It is an arithmetic number, because the mean of its divisors is an integer number (5149800).

Almost surely, 2^20341631 is an apocalyptic number.

20341631 is a deficient number, since it is larger than the sum of its proper divisors (257569).

20341631 is an equidigital number, since it uses as much as digits as its factorization.

20341631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257568.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20341631 is about 4510.1697307308. The cubic root of 20341631 is about 272.9785927835.

Adding to 20341631 its reverse (13614302), we get a palindrome (33955933).

The spelling of 20341631 in words is "twenty million, three hundred forty-one thousand, six hundred thirty-one".