20412499 has 2 divisors, whose sum is σ = 20412500. Its totient is φ = 20412498.

The previous prime is 20412481. The next prime is 20412503. The reversal of 20412499 is 99421402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20412499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20412499.

It is not a weakly prime, because it can be changed into another prime (20412409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206249 + 10206250.

It is an arithmetic number, because the mean of its divisors is an integer number (10206250).

Almost surely, 2^20412499 is an apocalyptic number.

20412499 is a deficient number, since it is larger than the sum of its proper divisors (1).

20412499 is an equidigital number, since it uses as much as digits as its factorization.

20412499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 20412499 is about 4518.0193669350. The cubic root of 20412499 is about 273.2952344611.

The spelling of 20412499 in words is "twenty million, four hundred twelve thousand, four hundred ninety-nine".