20363231 has 8 divisors (see below), whose sum is σ = 24497280. Its totient is φ = 16535448.

The previous prime is 20363197. The next prime is 20363251. The reversal of 20363231 is 13236302.

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-20363231 is a prime.

It is a super-2 number, since 2×20363231² = 829322353518722, 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 (20363251) 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, 76421 + ... + 76686.

It is an arithmetic number, because the mean of its divisors is an integer number (3062160).

Almost surely, 2^20363231 is an apocalyptic number.

20363231 is a deficient number, since it is larger than the sum of its proper divisors (4134049).

20363231 is a wasteful number, since it uses less digits than its factorization.

20363231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153133.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 20363231 is about 4512.5636837611. The cubic root of 20363231 is about 273.0751804466.

Adding to 20363231 its reverse (13236302), we get a palindrome (33599533).

The spelling of 20363231 in words is "twenty million, three hundred sixty-three thousand, two hundred thirty-one".