20825804 has 12 divisors (see below), whose sum is σ = 36564528. Its totient is φ = 10378800.

The previous prime is 20825801. The next prime is 20825807. The reversal of 20825804 is 40852802.

It is an interprime number because it is at equal distance from previous prime (20825801) and next prime (20825807).

It is a super-2 number, since 2×20825804² = 867428224492832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20825801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7127 + ... + 9614.

It is an arithmetic number, because the mean of its divisors is an integer number (3047044).

Almost surely, 2^20825804 is an apocalyptic number.

It is an amenable number.

20825804 is a deficient number, since it is larger than the sum of its proper divisors (15738724).

20825804 is a wasteful number, since it uses less digits than its factorization.

20825804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17056 (or 17054 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 20825804 is about 4563.5297741989. The cubic root of 20825804 is about 275.1274516659.

The spelling of 20825804 in words is "twenty million, eight hundred twenty-five thousand, eight hundred four".