20425879 has 2 divisors, whose sum is σ = 20425880. Its totient is φ = 20425878.

The previous prime is 20425849. The next prime is 20425883. The reversal of 20425879 is 97852402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20425879 - 2¹¹ = 20423831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20425849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212939 + 10212940.

It is an arithmetic number, because the mean of its divisors is an integer number (10212940).

Almost surely, 2^20425879 is an apocalyptic number.

20425879 is a deficient number, since it is larger than the sum of its proper divisors (1).

20425879 is an equidigital number, since it uses as much as digits as its factorization.

20425879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 20425879 is about 4519.4998617104. The cubic root of 20425879 is about 273.3549346733.

It can be divided in two parts, 2042 and 5879, that added together give a square (7921 = 89²).

The spelling of 20425879 in words is "twenty million, four hundred twenty-five thousand, eight hundred seventy-nine".