20423886 has 48 divisors (see below), whose sum is σ = 47978496. Its totient is φ = 5778864.

The previous prime is 20423873. The next prime is 20423891. The reversal of 20423886 is 68832402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37065 + ... + 37611.

It is an arithmetic number, because the mean of its divisors is an integer number (999552).

Almost surely, 2^20423886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20423886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23989248).

20423886 is an abundant number, since it is smaller than the sum of its proper divisors (27554610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20423886 is a wasteful number, since it uses less digits than its factorization.

20423886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 20423886 is about 4519.2793673328. The cubic root of 20423886 is about 273.3460437608.

It can be divided in two parts, 204 and 23886, that added together give a triangular number (24090 = T₂₁₉).

The spelling of 20423886 in words is "twenty million, four hundred twenty-three thousand, eight hundred eighty-six".