20381892 has 48 divisors (see below), whose sum is σ = 49230720. Its totient is φ = 6559488.

The previous prime is 20381891. The next prime is 20381909. The reversal of 20381892 is 29818302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20381891) 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, 46209 + ... + 46647.

It is an arithmetic number, because the mean of its divisors is an integer number (1025640).

Almost surely, 2^20381892 is an apocalyptic number.

It is an amenable number.

20381892 is an abundant number, since it is smaller than the sum of its proper divisors (28848828).

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

20381892 is a wasteful number, since it uses less digits than its factorization.

20381892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 20381892 is about 4514.6308819216. The cubic root of 20381892 is about 273.1585709476.

The spelling of 20381892 in words is "twenty million, three hundred eighty-one thousand, eight hundred ninety-two".