20245047 has 4 divisors (see below), whose sum is σ = 26993400. Its totient is φ = 13496696.

The previous prime is 20245019. The next prime is 20245061. The reversal of 20245047 is 74054202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20245047 - 2²⁴ = 3467831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20245007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3374172 + ... + 3374177.

It is an arithmetic number, because the mean of its divisors is an integer number (6748350).

Almost surely, 2^20245047 is an apocalyptic number.

20245047 is a deficient number, since it is larger than the sum of its proper divisors (6748353).

20245047 is an equidigital number, since it uses as much as digits as its factorization.

20245047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6748352.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 20245047 is about 4499.4496330107. The cubic root of 20245047 is about 272.5458644009.

Adding to 20245047 its reverse (74054202), we get a palindrome (94299249).

The spelling of 20245047 in words is "twenty million, two hundred forty-five thousand, forty-seven".