20262431 has 12 divisors (see below), whose sum is σ = 23960520. Its totient is φ = 17080560.

The previous prime is 20262413. The next prime is 20262433. The reversal of 20262431 is 13426202.

It is not a de Polignac number, because 20262431 - 2¹⁰ = 20261407 is a prime.

It is a super-2 number, since 2×20262431² = 821132220059522, 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 (20262433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 401 + ... + 6378.

It is an arithmetic number, because the mean of its divisors is an integer number (1996710).

Almost surely, 2^20262431 is an apocalyptic number.

20262431 is a deficient number, since it is larger than the sum of its proper divisors (3698089).

20262431 is an equidigital number, since it uses as much as digits as its factorization.

20262431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6854 (or 6847 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20262431 is about 4501.3810103123. The cubic root of 20262431 is about 272.6238519013.

Adding to 20262431 its reverse (13426202), we get a palindrome (33688633).

The spelling of 20262431 in words is "twenty million, two hundred sixty-two thousand, four hundred thirty-one".