20833290 has 24 divisors (see below), whose sum is σ = 54166788. Its totient is φ = 5555520.

The previous prime is 20833283. The next prime is 20833297. The reversal of 20833290 is 9233802.

It is an interprime number because it is at equal distance from previous prime (20833283) and next prime (20833297).

It can be written as a sum of positive squares in 2 ways, for example, as 20820969 + 12321 = 4563^2 + 111^2 .

It is not an unprimeable number, because it can be changed into a prime (20833297) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115651 + ... + 115830.

Almost surely, 2^20833290 is an apocalyptic number.

20833290 is an abundant number, since it is smaller than the sum of its proper divisors (33333498).

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

20833290 is a wasteful number, since it uses less digits than its factorization.

20833290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231494 (or 231491 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20833290 is about 4564.3498989451. The cubic root of 20833290 is about 275.1604132964.

The spelling of 20833290 in words is "twenty million, eight hundred thirty-three thousand, two hundred ninety".