25821994 has 16 divisors (see below), whose sum is σ = 42374016. Its totient is φ = 11704000.

The previous prime is 25821949. The next prime is 25822009. The reversal of 25821994 is 49912852.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7359 + ... + 10285.

It is an arithmetic number, because the mean of its divisors is an integer number (2648376).

Almost surely, 2^25821994 is an apocalyptic number.

25821994 is a deficient number, since it is larger than the sum of its proper divisors (16552022).

25821994 is a wasteful number, since it uses less digits than its factorization.

25821994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3341.

The product of its digits is 51840, while the sum is 40.

The square root of 25821994 is about 5081.5346107254. The cubic root of 25821994 is about 295.5719784615.

The spelling of 25821994 in words is "twenty-five million, eight hundred twenty-one thousand, nine hundred ninety-four".