20894879 has 16 divisors (see below), whose sum is σ = 22659264. Its totient is φ = 19219200.

The previous prime is 20894869. The next prime is 20894911. The reversal of 20894879 is 97849802.

It is a cyclic number.

It is not a de Polignac number, because 20894879 - 2¹² = 20890783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20894869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74219 + ... + 74499.

It is an arithmetic number, because the mean of its divisors is an integer number (1416204).

Almost surely, 2^20894879 is an apocalyptic number.

20894879 is a deficient number, since it is larger than the sum of its proper divisors (1764385).

20894879 is a wasteful number, since it uses less digits than its factorization.

20894879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 20894879 is about 4571.0916639245. The cubic root of 20894879 is about 275.4312967750.

The spelling of 20894879 in words is "twenty million, eight hundred ninety-four thousand, eight hundred seventy-nine".