20791484 has 72 divisors (see below), whose sum is σ = 45122112. Its totient is φ = 8346240.

The previous prime is 20791451. The next prime is 20791487. The reversal of 20791484 is 48419702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20791487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 340814 + ... + 340874.

It is an arithmetic number, because the mean of its divisors is an integer number (626696).

Almost surely, 2^20791484 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 20791484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22561056).

20791484 is an abundant number, since it is smaller than the sum of its proper divisors (24330628).

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

20791484 is a wasteful number, since it uses less digits than its factorization.

20791484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 20791484 is about 4559.7679765532. The cubic root of 20791484 is about 274.9762359630.

The spelling of 20791484 in words is "twenty million, seven hundred ninety-one thousand, four hundred eighty-four".