25820994 has 24 divisors (see below), whose sum is σ = 54862128. Its totient is φ = 8100160.

The previous prime is 25820989. The next prime is 25821043. The reversal of 25820994 is 49902852.

It is a super-2 number, since 2×25820994² = 1333447462296072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5712 + ... + 9179.

It is an arithmetic number, because the mean of its divisors is an integer number (2285922).

Almost surely, 2^25820994 is an apocalyptic number.

25820994 is an abundant number, since it is smaller than the sum of its proper divisors (29041134).

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

25820994 is a wasteful number, since it uses less digits than its factorization.

25820994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14930 (or 14913 counting only the distinct ones).

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

The square root of 25820994 is about 5081.4362143000. The cubic root of 25820994 is about 295.5681629055.

The spelling of 25820994 in words is "twenty-five million, eight hundred twenty thousand, nine hundred ninety-four".