20245845 has 16 divisors (see below), whose sum is σ = 33269760. Its totient is φ = 10505664.

The previous prime is 20245837. The next prime is 20245847. The reversal of 20245845 is 54854202.

It is not a de Polignac number, because 20245845 - 2³ = 20245837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20245847) 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, 17685 + ... + 18794.

It is an arithmetic number, because the mean of its divisors is an integer number (2079360).

Almost surely, 2^20245845 is an apocalyptic number.

It is an amenable number.

20245845 is a deficient number, since it is larger than the sum of its proper divisors (13023915).

20245845 is a wasteful number, since it uses less digits than its factorization.

20245845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36524.

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 20245845 is about 4499.5383096491. The cubic root of 20245845 is about 272.5494453384.

The spelling of 20245845 in words is "twenty million, two hundred forty-five thousand, eight hundred forty-five".