20112785 has 48 divisors (see below), whose sum is σ = 32503680. Its totient is φ = 11773440.

The previous prime is 20112779. The next prime is 20112791. The reversal of 20112785 is 58721102.

It is an interprime number because it is at equal distance from previous prime (20112779) and next prime (20112791).

It is not a de Polignac number, because 20112785 - 2⁶ = 20112721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45596 + ... + 46034.

It is an arithmetic number, because the mean of its divisors is an integer number (677160).

Almost surely, 2^20112785 is an apocalyptic number.

It is an amenable number.

20112785 is a deficient number, since it is larger than the sum of its proper divisors (12390895).

20112785 is a wasteful number, since it uses less digits than its factorization.

20112785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 20112785 is about 4484.7279739132. The cubic root of 20112785 is about 271.9510481760.

Adding to 20112785 its reverse (58721102), we get a palindrome (78833887).

The spelling of 20112785 in words is "twenty million, one hundred twelve thousand, seven hundred eighty-five".