20444940 has 48 divisors (see below), whose sum is σ = 63608160. Its totient is φ = 5451840.

The previous prime is 20444939. The next prime is 20444987. The reversal of 20444940 is 4944402.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18391 + ... + 19470.

It is an arithmetic number, because the mean of its divisors is an integer number (1325170).

Almost surely, 2^20444940 is an apocalyptic number.

20444940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20444940 is an abundant number, since it is smaller than the sum of its proper divisors (43163220).

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

20444940 is a wasteful number, since it uses less digits than its factorization.

20444940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37879 (or 37871 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 20444940 is about 4521.6081210118. The cubic root of 20444940 is about 273.4399379266.

The spelling of 20444940 in words is "twenty million, four hundred forty-four thousand, nine hundred forty".