25920194 has 4 divisors (see below), whose sum is σ = 38880294. Its totient is φ = 12960096.

The previous prime is 25920187. The next prime is 25920203. The reversal of 25920194 is 49102952.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25633969 + 286225 = 5063^2 + 535^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25920194.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6480047 + ... + 6480050.

Almost surely, 2^25920194 is an apocalyptic number.

25920194 is a deficient number, since it is larger than the sum of its proper divisors (12960100).

25920194 is a wasteful number, since it uses less digits than its factorization.

25920194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12960099.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 25920194 is about 5091.1878771069. The cubic root of 25920194 is about 295.9461872591.

The spelling of 25920194 in words is "twenty-five million, nine hundred twenty thousand, one hundred ninety-four".