20440944 has 40 divisors (see below), whose sum is σ = 58674320. Its totient is φ = 6813504.

The previous prime is 20440943. The next prime is 20440957. The reversal of 20440944 is 44904402.

It is a super-2 number, since 2×20440944² = 835664383222272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23227 + ... + 24090.

It is an arithmetic number, because the mean of its divisors is an integer number (1466858).

Almost surely, 2^20440944 is an apocalyptic number.

20440944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20440944 is an abundant number, since it is smaller than the sum of its proper divisors (38233376).

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

20440944 is a wasteful number, since it uses less digits than its factorization.

20440944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47334 (or 47322 counting only the distinct ones).

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

The square root of 20440944 is about 4521.1662212310. The cubic root of 20440944 is about 273.4221219912.

The spelling of 20440944 in words is "twenty million, four hundred forty thousand, nine hundred forty-four".