20025139 has 2 divisors, whose sum is σ = 20025140. Its totient is φ = 20025138.

The previous prime is 20025127. The next prime is 20025151. The reversal of 20025139 is 93152002.

It is a balanced prime because it is at equal distance from previous prime (20025127) and next prime (20025151).

It is a cyclic number.

It is not a de Polignac number, because 20025139 - 2¹³ = 20016947 is a prime.

It is not a weakly prime, because it can be changed into another prime (20025119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10012569 + 10012570.

It is an arithmetic number, because the mean of its divisors is an integer number (10012570).

Almost surely, 2^20025139 is an apocalyptic number.

20025139 is a deficient number, since it is larger than the sum of its proper divisors (1).

20025139 is an equidigital number, since it uses as much as digits as its factorization.

20025139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 20025139 is about 4474.9456979946. The cubic root of 20025139 is about 271.5554436160. Note that the first 3 decimals are identical.

It can be divided in two parts, 20025 and 139, that added together give a square (20164 = 142²).

The spelling of 20025139 in words is "twenty million, twenty-five thousand, one hundred thirty-nine".