20379944 has 32 divisors (see below), whose sum is σ = 41502720. Its totient is φ = 9326016.

The previous prime is 20379929. The next prime is 20379971. The reversal of 20379944 is 44997302.

It is a junction number, because it is equal to n+sod(n) for n = 20379898 and 20379907.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12437 + ... + 13979.

It is an arithmetic number, because the mean of its divisors is an integer number (1296960).

Almost surely, 2^20379944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20379944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20751360).

20379944 is an abundant number, since it is smaller than the sum of its proper divisors (21122776).

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

20379944 is a wasteful number, since it uses less digits than its factorization.

20379944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689 (or 1685 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 20379944 is about 4514.4151337687. The cubic root of 20379944 is about 273.1498682906.

The spelling of 20379944 in words is "twenty million, three hundred seventy-nine thousand, nine hundred forty-four".