20411431 has 2 divisors, whose sum is σ = 20411432. Its totient is φ = 20411430.

The previous prime is 20411411. The next prime is 20411473. The reversal of 20411431 is 13411402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20411431 - 2⁹ = 20410919 is a prime.

It is a super-2 number, since 2×20411431² = 833253030935522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20411411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10205715 + 10205716.

It is an arithmetic number, because the mean of its divisors is an integer number (10205716).

Almost surely, 2^20411431 is an apocalyptic number.

20411431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20411431 is an equidigital number, since it uses as much as digits as its factorization.

20411431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 20411431 is about 4517.9011720045. The cubic root of 20411431 is about 273.2904680285.

Adding to 20411431 its reverse (13411402), we get a palindrome (33822833).

The spelling of 20411431 in words is "twenty million, four hundred eleven thousand, four hundred thirty-one".