20412157 has 2 divisors, whose sum is σ = 20412158. Its totient is φ = 20412156.

The previous prime is 20412151. The next prime is 20412163. The reversal of 20412157 is 75121402.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (20412151) and next prime (20412163).

It can be written as a sum of positive squares in only one way, i.e., 14584761 + 5827396 = 3819^2 + 2414^2 .

It is a cyclic number.

It is not a de Polignac number, because 20412157 - 2³ = 20412149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20412151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206078 + 10206079.

It is an arithmetic number, because the mean of its divisors is an integer number (10206079).

Almost surely, 2^20412157 is an apocalyptic number.

It is an amenable number.

20412157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20412157 is an equidigital number, since it uses as much as digits as its factorization.

20412157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 20412157 is about 4517.9815183332. The cubic root of 20412157 is about 273.2937081497.

Adding to 20412157 its reverse (75121402), we get a palindrome (95533559).

The spelling of 20412157 in words is "twenty million, four hundred twelve thousand, one hundred fifty-seven".