20265785 has 16 divisors (see below), whose sum is σ = 26583552. Its totient is φ = 14764800.

The previous prime is 20265781. The next prime is 20265787. The reversal of 20265785 is 58756202.

It is not a de Polignac number, because 20265785 - 2² = 20265781 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20265781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1211 + ... + 6480.

It is an arithmetic number, because the mean of its divisors is an integer number (1661472).

Almost surely, 2^20265785 is an apocalyptic number.

It is an amenable number.

20265785 is a deficient number, since it is larger than the sum of its proper divisors (6317767).

20265785 is a wasteful number, since it uses less digits than its factorization.

20265785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7744.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 20265785 is about 4501.7535472302. The cubic root of 20265785 is about 272.6388933665.

The spelling of 20265785 in words is "twenty million, two hundred sixty-five thousand, seven hundred eighty-five".