20894893 has 4 divisors (see below), whose sum is σ = 21054528. Its totient is φ = 20735260.

The previous prime is 20894869. The next prime is 20894911. The reversal of 20894893 is 39849802.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20894893 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 (20894843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79621 + ... + 79882.

It is an arithmetic number, because the mean of its divisors is an integer number (5263632).

Almost surely, 2^20894893 is an apocalyptic number.

It is an amenable number.

20894893 is a deficient number, since it is larger than the sum of its proper divisors (159635).

20894893 is a wasteful number, since it uses less digits than its factorization.

20894893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159634.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 20894893 is about 4571.0931952871. The cubic root of 20894893 is about 275.4313582898.

The spelling of 20894893 in words is "twenty million, eight hundred ninety-four thousand, eight hundred ninety-three".