20236845 has 16 divisors (see below), whose sum is σ = 32564160. Its totient is φ = 10731264.

The previous prime is 20236807. The next prime is 20236861. The reversal of 20236845 is 54863202.

It is not a de Polignac number, because 20236845 - 2⁶ = 20236781 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1084 + ... + 6453.

It is an arithmetic number, because the mean of its divisors is an integer number (2035260).

Almost surely, 2^20236845 is an apocalyptic number.

It is an amenable number.

20236845 is a deficient number, since it is larger than the sum of its proper divisors (12327315).

20236845 is a wasteful number, since it uses less digits than its factorization.

20236845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7724.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 20236845 is about 4498.5380958707. The cubic root of 20236845 is about 272.5090533703.

The spelling of 20236845 in words is "twenty million, two hundred thirty-six thousand, eight hundred forty-five".