20245707 has 10 divisors (see below), whose sum is σ = 30243708. Its totient is φ = 13497084.

The previous prime is 20245699. The next prime is 20245711. The reversal of 20245707 is 70754202.

20245707 is a `hidden beast` number, since 202 + 457 + 0 + 7 = 666.

It is not a de Polignac number, because 20245707 - 2³ = 20245699 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20245777) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 124893 + ... + 125054.

Almost surely, 2^20245707 is an apocalyptic number.

20245707 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20245707 is a deficient number, since it is larger than the sum of its proper divisors (9998001).

20245707 is an equidigital number, since it uses as much as digits as its factorization.

20245707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249959 (or 249950 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 20245707 is about 4499.5229747163. The cubic root of 20245707 is about 272.5488260852.

Adding to 20245707 its reverse (70754202), we get a palindrome (90999909).

The spelling of 20245707 in words is "twenty million, two hundred forty-five thousand, seven hundred seven".