20216944 has 80 divisors (see below), whose sum is σ = 47005920. Its totient is φ = 8314880.

The previous prime is 20216941. The next prime is 20216947. The reversal of 20216944 is 44961202.

It is an interprime number because it is at equal distance from previous prime (20216941) and next prime (20216947).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20216941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86652 + ... + 86884.

It is an arithmetic number, because the mean of its divisors is an integer number (587574).

Almost surely, 2^20216944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20216944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23502960).

20216944 is an abundant number, since it is smaller than the sum of its proper divisors (26788976).

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

20216944 is a wasteful number, since it uses less digits than its factorization.

20216944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20216944 is about 4496.3256109850. The cubic root of 20216944 is about 272.4196952157.

The spelling of 20216944 in words is "twenty million, two hundred sixteen thousand, nine hundred forty-four".