20425895 has 24 divisors (see below), whose sum is σ = 28711584. Its totient is φ = 13909056.

The previous prime is 20425883. The next prime is 20425897. The reversal of 20425895 is 59852402.

It is a happy number.

It is not a de Polignac number, because 20425895 - 2⁴ = 20425879 is a prime.

It is a super-3 number, since 3×20425895³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20425897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64277 + ... + 64593.

It is an arithmetic number, because the mean of its divisors is an integer number (1196316).

Almost surely, 2^20425895 is an apocalyptic number.

20425895 is a deficient number, since it is larger than the sum of its proper divisors (8285689).

20425895 is a wasteful number, since it uses less digits than its factorization.

20425895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 592 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 20425895 is about 4519.5016318174. The cubic root of 20425895 is about 273.3550060481.

The spelling of 20425895 in words is "twenty million, four hundred twenty-five thousand, eight hundred ninety-five".