20032631 has 8 divisors (see below), whose sum is σ = 21342720. Its totient is φ = 18748152.

The previous prime is 20032627. The next prime is 20032633. The reversal of 20032631 is 13623002.

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

It is a cyclic number.

It is not a de Polignac number, because 20032631 - 2² = 20032627 is a prime.

It is a super-2 number, since 2×20032631² = 802612609564322, 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 (20032633) 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, 4775 + ... + 7928.

It is an arithmetic number, because the mean of its divisors is an integer number (2667840).

Almost surely, 2^20032631 is an apocalyptic number.

20032631 is a deficient number, since it is larger than the sum of its proper divisors (1310089).

20032631 is a wasteful number, since it uses less digits than its factorization.

20032631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12805.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 20032631 is about 4475.7827248427. The cubic root of 20032631 is about 271.5893050492.

Adding to 20032631 its reverse (13623002), we get a palindrome (33655633).

The spelling of 20032631 in words is "twenty million, thirty-two thousand, six hundred thirty-one".