20413399 has 2 divisors, whose sum is σ = 20413400. Its totient is φ = 20413398.

The previous prime is 20413357. The next prime is 20413403. The reversal of 20413399 is 99331402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20413399 - 2¹³ = 20405207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20413399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20413199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206699 + 10206700.

It is an arithmetic number, because the mean of its divisors is an integer number (10206700).

Almost surely, 2^20413399 is an apocalyptic number.

20413399 is a deficient number, since it is larger than the sum of its proper divisors (1).

20413399 is an equidigital number, since it uses as much as digits as its factorization.

20413399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 20413399 is about 4518.1189670039. The cubic root of 20413399 is about 273.2992509887.

The spelling of 20413399 in words is "twenty million, four hundred thirteen thousand, three hundred ninety-nine".