20881893 has 16 divisors (see below), whose sum is σ = 29585600. Its totient is φ = 13063680.

The previous prime is 20881873. The next prime is 20881897. The reversal of 20881893 is 39818802.

It is not a de Polignac number, because 20881893 - 2⁶ = 20881829 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 (20881897) 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, 4533 + ... + 7893.

It is an arithmetic number, because the mean of its divisors is an integer number (1849100).

Almost surely, 2^20881893 is an apocalyptic number.

It is an amenable number.

20881893 is a deficient number, since it is larger than the sum of its proper divisors (8703707).

20881893 is a wasteful number, since it uses less digits than its factorization.

20881893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 20881893 is about 4569.6709947216. The cubic root of 20881893 is about 275.3742255017.

The spelling of 20881893 in words is "twenty million, eight hundred eighty-one thousand, eight hundred ninety-three".