20259894 has 16 divisors (see below), whose sum is σ = 40914432. Its totient is φ = 6687528.

The previous prime is 20259887. The next prime is 20259913. The reversal of 20259894 is 49895202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15774 + ... + 17009.

It is an arithmetic number, because the mean of its divisors is an integer number (2557152).

Almost surely, 2^20259894 is an apocalyptic number.

20259894 is an abundant number, since it is smaller than the sum of its proper divisors (20654538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20259894 is a wasteful number, since it uses less digits than its factorization.

20259894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32891.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 20259894 is about 4501.0991990846. The cubic root of 20259894 is about 272.6124732801.

The spelling of 20259894 in words is "twenty million, two hundred fifty-nine thousand, eight hundred ninety-four".