20150845 has 16 divisors (see below), whose sum is σ = 28409472. Its totient is φ = 13527360.

The previous prime is 20150843. The next prime is 20150857. The reversal of 20150845 is 54805102.

It is not a de Polignac number, because 20150845 - 2¹ = 20150843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20150843) 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, 13377 + ... + 14806.

It is an arithmetic number, because the mean of its divisors is an integer number (1775592).

Almost surely, 2^20150845 is an apocalyptic number.

It is an amenable number.

20150845 is a deficient number, since it is larger than the sum of its proper divisors (8258627).

20150845 is a wasteful number, since it uses less digits than its factorization.

20150845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28212.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 20150845 is about 4488.9692580814. The cubic root of 20150845 is about 272.1224803426.

Adding to 20150845 its reverse (54805102), we get a palindrome (74955947).

The spelling of 20150845 in words is "twenty million, one hundred fifty thousand, eight hundred forty-five".