20252985 has 16 divisors (see below), whose sum is σ = 32503680. Its totient is φ = 10768640.

The previous prime is 20252983. The next prime is 20252987. The reversal of 20252985 is 58925202.

It is an interprime number because it is at equal distance from previous prime (20252983) and next prime (20252987).

It is not a de Polignac number, because 20252985 - 2¹ = 20252983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20252983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3505 + ... + 7265.

It is an arithmetic number, because the mean of its divisors is an integer number (2031480).

Almost surely, 2^20252985 is an apocalyptic number.

It is an amenable number.

20252985 is a deficient number, since it is larger than the sum of its proper divisors (12250695).

20252985 is a wasteful number, since it uses less digits than its factorization.

20252985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4128.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 20252985 is about 4500.3316544450. The cubic root of 20252985 is about 272.5814811186.

The spelling of 20252985 in words is "twenty million, two hundred fifty-two thousand, nine hundred eighty-five".