20162889 has 6 divisors (see below), whose sum is σ = 29124186. Its totient is φ = 13441920.

The previous prime is 20162887. The next prime is 20162897. The reversal of 20162889 is 98826102.

20162889 is a `hidden beast` number, since 20 + 1 + 628 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11799225 + 8363664 = 3435^2 + 2892^2 .

It is not a de Polignac number, because 20162889 - 2¹ = 20162887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20162887) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1120152 + ... + 1120169.

It is an arithmetic number, because the mean of its divisors is an integer number (4854031).

Almost surely, 2^20162889 is an apocalyptic number.

It is an amenable number.

20162889 is a deficient number, since it is larger than the sum of its proper divisors (8961297).

20162889 is a wasteful number, since it uses less digits than its factorization.

20162889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240327 (or 2240324 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 20162889 is about 4490.3105683238. The cubic root of 20162889 is about 272.1766846932.

The spelling of 20162889 in words is "twenty million, one hundred sixty-two thousand, eight hundred eighty-nine".