25021994 has 16 divisors (see below), whose sum is σ = 40192200. Its totient is φ = 11641344.

The previous prime is 25021987. The next prime is 25022003. The reversal of 25021994 is 49912052.

It can be written as a sum of positive squares in 4 ways, for example, as 24373969 + 648025 = 4937^2 + 805^2 .

It is a super-2 number, since 2×25021994² = 1252200367472072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25021994.

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, 1109 + ... + 7160.

Almost surely, 2^25021994 is an apocalyptic number.

25021994 is a deficient number, since it is larger than the sum of its proper divisors (15170206).

25021994 is a wasteful number, since it uses less digits than its factorization.

25021994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8377.

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

The square root of 25021994 is about 5002.1989164766. The cubic root of 25021994 is about 292.4874964826.

The spelling of 25021994 in words is "twenty-five million, twenty-one thousand, nine hundred ninety-four".