20958090 has 32 divisors (see below), whose sum is σ = 50777280. Its totient is φ = 5535744.

The previous prime is 20958089. The next prime is 20958101. The reversal of 20958090 is 9085902.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55 + ... + 6474.

It is an arithmetic number, because the mean of its divisors is an integer number (1586790).

Almost surely, 2^20958090 is an apocalyptic number.

20958090 is an abundant number, since it is smaller than the sum of its proper divisors (29819190).

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

20958090 is a wasteful number, since it uses less digits than its factorization.

20958090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6646.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 20958090 is about 4578.0006553079. Note that the first 3 decimals coincide. The cubic root of 20958090 is about 275.7087612623.

The spelling of 20958090 in words is "twenty million, nine hundred fifty-eight thousand, ninety".