20474231 has 4 divisors (see below), whose sum is σ = 20497200. Its totient is φ = 20451264.

The previous prime is 20474221. The next prime is 20474249. The reversal of 20474231 is 13247402.

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 20474231 - 2²² = 16279927 is a prime.

It is a super-2 number, since 2×20474231² = 838388270082722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20474197 and 20474206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20474221) 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, 10091 + ... + 11948.

It is an arithmetic number, because the mean of its divisors is an integer number (5124300).

Almost surely, 2^20474231 is an apocalyptic number.

20474231 is a deficient number, since it is larger than the sum of its proper divisors (22969).

20474231 is an equidigital number, since it uses as much as digits as its factorization.

20474231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22968.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20474231 is about 4524.8459642291. The cubic root of 20474231 is about 273.5704593390.

The spelling of 20474231 in words is "twenty million, four hundred seventy-four thousand, two hundred thirty-one".