20748785 has 16 divisors (see below), whose sum is σ = 25401600. Its totient is φ = 16267776.

The previous prime is 20748773. The next prime is 20748803. The reversal of 20748785 is 58784702.

It is a cyclic number.

It is not a de Polignac number, because 20748785 - 2⁴ = 20748769 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86696 + ... + 86934.

It is an arithmetic number, because the mean of its divisors is an integer number (1587600).

Almost surely, 2^20748785 is an apocalyptic number.

It is an amenable number.

20748785 is a deficient number, since it is larger than the sum of its proper divisors (4652815).

20748785 is a wasteful number, since it uses less digits than its factorization.

20748785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 20748785 is about 4555.0834240440. The cubic root of 20748785 is about 274.7878694659.

The spelling of 20748785 in words is "twenty million, seven hundred forty-eight thousand, seven hundred eighty-five".