20240431 has 2 divisors, whose sum is σ = 20240432. Its totient is φ = 20240430.

The previous prime is 20240419. The next prime is 20240449. The reversal of 20240431 is 13404202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20240431 - 2⁵ = 20240399 is a prime.

It is a super-2 number, since 2×20240431² = 819350094131522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20240411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10120215 + 10120216.

It is an arithmetic number, because the mean of its divisors is an integer number (10120216).

Almost surely, 2^20240431 is an apocalyptic number.

20240431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20240431 is an equidigital number, since it uses as much as digits as its factorization.

20240431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20240431 is about 4498.9366521435. The cubic root of 20240431 is about 272.5251487605.

Adding to 20240431 its reverse (13404202), we get a palindrome (33644633).

The spelling of 20240431 in words is "twenty million, two hundred forty thousand, four hundred thirty-one".