20825590 has 16 divisors (see below), whose sum is σ = 37596960. Its totient is φ = 8305600.

The previous prime is 20825573. The next prime is 20825591. The reversal of 20825590 is 9552802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20825591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 690 + ... + 6490.

It is an arithmetic number, because the mean of its divisors is an integer number (2349810).

Almost surely, 2^20825590 is an apocalyptic number.

20825590 is a deficient number, since it is larger than the sum of its proper divisors (16771370).

20825590 is a wasteful number, since it uses less digits than its factorization.

20825590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6167.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 20825590 is about 4563.5063273759. The cubic root of 20825590 is about 275.1265092856.

The spelling of 20825590 in words is "twenty million, eight hundred twenty-five thousand, five hundred ninety".