20894133 has 32 divisors (see below), whose sum is σ = 31328640. Its totient is φ = 12303360.

The previous prime is 20894131. The next prime is 20894149. The reversal of 20894133 is 33149802.

It is not a de Polignac number, because 20894133 - 2¹ = 20894131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20894133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20894131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116638 + ... + 116816.

It is an arithmetic number, because the mean of its divisors is an integer number (979020).

Almost surely, 2^20894133 is an apocalyptic number.

It is an amenable number.

20894133 is a deficient number, since it is larger than the sum of its proper divisors (10434507).

20894133 is a wasteful number, since it uses less digits than its factorization.

20894133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 20894133 is about 4571.0100634324. The cubic root of 20894133 is about 275.4280188714.

The spelling of 20894133 in words is "twenty million, eight hundred ninety-four thousand, one hundred thirty-three".