20785080 has 32 divisors (see below), whose sum is σ = 62355600. Its totient is φ = 5542656.

The previous prime is 20785057. The next prime is 20785081. The reversal of 20785080 is 8058702.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20785081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86485 + ... + 86724.

Almost surely, 2^20785080 is an apocalyptic number.

20785080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20785080 is an abundant number, since it is smaller than the sum of its proper divisors (41570520).

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

20785080 is a wasteful number, since it uses less digits than its factorization.

20785080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173223 (or 173219 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 20785080 is about 4559.0656937579. The cubic root of 20785080 is about 274.9480011876.

The spelling of 20785080 in words is "twenty million, seven hundred eighty-five thousand, eighty".