20039231 has 8 divisors (see below), whose sum is σ = 20420400. Its totient is φ = 19660608.

The previous prime is 20039221. The next prime is 20039251. The reversal of 20039231 is 13293002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20039231 is a prime.

It is a super-2 number, since 2×20039231² = 803141558142722, 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 (20039221) 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, 22955 + ... + 23811.

It is an arithmetic number, because the mean of its divisors is an integer number (2552550).

Almost surely, 2^20039231 is an apocalyptic number.

20039231 is a deficient number, since it is larger than the sum of its proper divisors (381169).

20039231 is an equidigital number, since it uses as much as digits as its factorization.

20039231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 20039231 is about 4476.5199653302. The cubic root of 20039231 is about 271.6191279349.

The spelling of 20039231 in words is "twenty million, thirty-nine thousand, two hundred thirty-one".