20838290 has 16 divisors (see below), whose sum is σ = 40919040. Its totient is φ = 7577520.

The previous prime is 20838281. The next prime is 20838317. The reversal of 20838290 is 9283802.

It is a happy number.

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, 94610 + ... + 94829.

It is an arithmetic number, because the mean of its divisors is an integer number (2557440).

Almost surely, 2^20838290 is an apocalyptic number.

20838290 is a deficient number, since it is larger than the sum of its proper divisors (20080750).

20838290 is a wasteful number, since it uses less digits than its factorization.

20838290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189457.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 20838290 is about 4564.8975892127. The cubic root of 20838290 is about 275.1824244145.

The spelling of 20838290 in words is "twenty million, eight hundred thirty-eight thousand, two hundred ninety".