20412031 has 4 divisors (see below), whose sum is σ = 20437200. Its totient is φ = 20386864.

The previous prime is 20411983. The next prime is 20412037. The reversal of 20412031 is 13021402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13021402 = 2 ⋅6510701.

It is a cyclic number.

It is not a de Polignac number, because 20412031 - 2⁷ = 20411903 is a prime.

It is a super-2 number, since 2×20412031² = 833302019089922, 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 (20412037) 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, 11326 + ... + 13003.

It is an arithmetic number, because the mean of its divisors is an integer number (5109300).

Almost surely, 2^20412031 is an apocalyptic number.

20412031 is a deficient number, since it is larger than the sum of its proper divisors (25169).

20412031 is an equidigital number, since it uses as much as digits as its factorization.

20412031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25168.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20412031 is about 4517.9675740315. The cubic root of 20412031 is about 273.2931458201.

Adding to 20412031 its reverse (13021402), we get a palindrome (33433433).

The spelling of 20412031 in words is "twenty million, four hundred twelve thousand, thirty-one".