20791080 has 224 divisors, whose sum is σ = 75548160. Its totient is φ = 5132160.

The previous prime is 20791037. The next prime is 20791081. The reversal of 20791080 is 8019702.

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 (20791081) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 670665 + ... + 670695.

Almost surely, 2^20791080 is an apocalyptic number.

20791080 is a gapful number since it is divisible by the number (20) 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 20791080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37774080).

20791080 is an abundant number, since it is smaller than the sum of its proper divisors (54757080).

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

20791080 is a wasteful number, since it uses less digits than its factorization.

20791080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 20791080 is about 4559.7236758383. The cubic root of 20791080 is about 274.9744549274.

The spelling of 20791080 in words is "twenty million, seven hundred ninety-one thousand, eighty".