20719944 has 96 divisors (see below), whose sum is σ = 65520000. Its totient is φ = 5912928.

The previous prime is 20719927. The next prime is 20719961. The reversal of 20719944 is 44991702.

It is an interprime number because it is at equal distance from previous prime (20719927) and next prime (20719961).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20719899 and 20719908.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24277 + ... + 25115.

It is an arithmetic number, because the mean of its divisors is an integer number (682500).

Almost surely, 2^20719944 is an apocalyptic number.

20719944 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 20719944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32760000).

20719944 is an abundant number, since it is smaller than the sum of its proper divisors (44800056).

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

20719944 is a wasteful number, since it uses less digits than its factorization.

20719944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 20719944 is about 4551.9165194454. The cubic root of 20719944 is about 274.6604912155.

The spelling of 20719944 in words is "twenty million, seven hundred nineteen thousand, nine hundred forty-four".