20425499 has 2 divisors, whose sum is σ = 20425500. Its totient is φ = 20425498.

The previous prime is 20425487. The next prime is 20425507. The reversal of 20425499 is 99452402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20425499 - 2⁸ = 20425243 is a prime.

It is a Chen prime.

It is equal to p_1295837 and since 20425499 and 1295837 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20425429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212749 + 10212750.

It is an arithmetic number, because the mean of its divisors is an integer number (10212750).

Almost surely, 2^20425499 is an apocalyptic number.

20425499 is a deficient number, since it is larger than the sum of its proper divisors (1).

20425499 is an equidigital number, since it uses as much as digits as its factorization.

20425499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 20425499 is about 4519.4578214649. The cubic root of 20425499 is about 273.3532395113.

The spelling of 20425499 in words is "twenty million, four hundred twenty-five thousand, four hundred ninety-nine".