20152431 has 12 divisors (see below), whose sum is σ = 31348408. Its totient is φ = 12401424.

The previous prime is 20152421. The next prime is 20152441. The reversal of 20152431 is 13425102.

It is an interprime number because it is at equal distance from previous prime (20152421) and next prime (20152441).

It is not a de Polignac number, because 20152431 - 2⁶ = 20152367 is a prime.

It is a super-2 number, since 2×20152431² = 812240950419522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20152411) 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, 86005 + ... + 86238.

Almost surely, 2^20152431 is an apocalyptic number.

20152431 is a deficient number, since it is larger than the sum of its proper divisors (11195977).

20152431 is a wasteful number, since it uses less digits than its factorization.

20152431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172262 (or 172259 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20152431 is about 4489.1459098586. The cubic root of 20152431 is about 272.1296194134.

Adding to 20152431 its reverse (13425102), we get a palindrome (33577533).

The spelling of 20152431 in words is "twenty million, one hundred fifty-two thousand, four hundred thirty-one".