20444970 has 64 divisors (see below), whose sum is σ = 60399360. Its totient is φ = 4313088.

The previous prime is 20444939. The next prime is 20444987. The reversal of 20444970 is 7944402.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1015 + ... + 6474.

It is an arithmetic number, because the mean of its divisors is an integer number (943740).

Almost surely, 2^20444970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20444970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30199680).

20444970 is an abundant number, since it is smaller than the sum of its proper divisors (39954390).

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

20444970 is a wasteful number, since it uses less digits than its factorization.

20444970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7519.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20444970 is about 4521.6114384144. The cubic root of 20444970 is about 273.4400716711.

The spelling of 20444970 in words is "twenty million, four hundred forty-four thousand, nine hundred seventy".