20116431 has 10 divisors (see below), whose sum is σ = 30050592. Its totient is φ = 13410900.

The previous prime is 20116429. The next prime is 20116441. The reversal of 20116431 is 13461102.

It is a happy number.

20116431 is a `hidden beast` number, since 20 + 1 + 1 + 643 + 1 = 666.

It is not a de Polignac number, because 20116431 - 2¹ = 20116429 is a prime.

It is a super-2 number, since 2×20116431² = 809341592355522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20116441) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 124095 + ... + 124256.

Almost surely, 2^20116431 is an apocalyptic number.

20116431 is a deficient number, since it is larger than the sum of its proper divisors (9934161).

20116431 is an equidigital number, since it uses as much as digits as its factorization.

20116431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248363 (or 248354 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 20116431 is about 4485.1344461454. The cubic root of 20116431 is about 271.9674800726.

Adding to 20116431 its reverse (13461102), we get a palindrome (33577533).

The spelling of 20116431 in words is "twenty million, one hundred sixteen thousand, four hundred thirty-one".