20244431 has 2 divisors, whose sum is σ = 20244432. Its totient is φ = 20244430.

The previous prime is 20244409. The next prime is 20244449. The reversal of 20244431 is 13444202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20244431 - 2¹⁰ = 20243407 is a prime.

It is a super-2 number, since 2×20244431² = 819673973027522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20244491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10122215 + 10122216.

It is an arithmetic number, because the mean of its divisors is an integer number (10122216).

Almost surely, 2^20244431 is an apocalyptic number.

20244431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20244431 is an equidigital number, since it uses as much as digits as its factorization.

20244431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20244431 is about 4499.3811796735. The cubic root of 20244431 is about 272.5431001041.

Adding to 20244431 its reverse (13444202), we get a palindrome (33688633).

The spelling of 20244431 in words is "twenty million, two hundred forty-four thousand, four hundred thirty-one".