20710080 has 280 divisors, whose sum is σ = 79662528. Its totient is φ = 5087232.

The previous prime is 20710037. The next prime is 20710093. The reversal of 20710080 is 8001702.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 440617 + ... + 440663.

Almost surely, 2^20710080 is an apocalyptic number.

20710080 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 20710080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39831264).

20710080 is an abundant number, since it is smaller than the sum of its proper divisors (58952448).

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

20710080 is a wasteful number, since it uses less digits than its factorization.

20710080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 20710080 is about 4550.8328908014. The cubic root of 20710080 is about 274.6168990590.

Adding to 20710080 its reverse (8001702), we get a palindrome (28711782).

The spelling of 20710080 in words is "twenty million, seven hundred ten thousand, eighty".