20170944 has 84 divisors (see below), whose sum is σ = 60003944. Its totient is φ = 6718464.

The previous prime is 20170933. The next prime is 20170949. The reversal of 20170944 is 44907102.

It is a happy number.

It is a super-2 number, since 2×20170944² = 813733963702272, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (20170949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14904 + ... + 16200.

Almost surely, 2^20170944 is an apocalyptic number.

20170944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20170944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30001972).

20170944 is an abundant number, since it is smaller than the sum of its proper divisors (39833000).

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

20170944 is an equidigital number, since it uses as much as digits as its factorization.

20170944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324 (or 1302 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 20170944 is about 4491.2074100402. The cubic root of 20170944 is about 272.2129243959.

The spelling of 20170944 in words is "twenty million, one hundred seventy thousand, nine hundred forty-four".