20425099 has 2 divisors, whose sum is σ = 20425100. Its totient is φ = 20425098.

The previous prime is 20425091. The next prime is 20425103. The reversal of 20425099 is 99052402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20425099 - 2³ = 20425091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20425099.

It is not a weakly prime, because it can be changed into another prime (20425091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212549 + 10212550.

It is an arithmetic number, because the mean of its divisors is an integer number (10212550).

Almost surely, 2^20425099 is an apocalyptic number.

20425099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20425099 is an equidigital number, since it uses as much as digits as its factorization.

20425099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 20425099 is about 4519.4135681524. The cubic root of 20425099 is about 273.3514551076.

The spelling of 20425099 in words is "twenty million, four hundred twenty-five thousand, ninety-nine".