20010431 has 4 divisors (see below), whose sum is σ = 22869072. Its totient is φ = 17151792.

The previous prime is 20010409. The next prime is 20010443. The reversal of 20010431 is 13401002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13401002 = 2 ⋅6700501.

It is not a de Polignac number, because 20010431 - 2¹⁴ = 19994047 is a prime.

It is a super-2 number, since 2×20010431² = 800834697611522, 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 (20010481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1429310 + ... + 1429323.

It is an arithmetic number, because the mean of its divisors is an integer number (5717268).

Almost surely, 2^20010431 is an apocalyptic number.

20010431 is a deficient number, since it is larger than the sum of its proper divisors (2858641).

20010431 is an equidigital number, since it uses as much as digits as its factorization.

20010431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858640.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20010431 is about 4473.3020242322. The cubic root of 20010431 is about 271.4889436081.

Adding to 20010431 its reverse (13401002), we get a palindrome (33411433).

The spelling of 20010431 in words is "twenty million, ten thousand, four hundred thirty-one".