20731150 has 24 divisors (see below), whose sum is σ = 42066504. Its totient is φ = 7538400.

The previous prime is 20731133. The next prime is 20731153. The reversal of 20731150 is 5113702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20731153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18297 + ... + 19396.

It is an arithmetic number, because the mean of its divisors is an integer number (1752771).

Almost surely, 2^20731150 is an apocalyptic number.

20731150 is an abundant number, since it is smaller than the sum of its proper divisors (21335354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20731150 is a wasteful number, since it uses less digits than its factorization.

20731150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37716 (or 37711 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 20731150 is about 4553.1472631577. The cubic root of 20731150 is about 274.7099973140.

Adding to 20731150 its reverse (5113702), we get a palindrome (25844852).

It can be divided in two parts, 2073 and 1150, that added together give a palindrome (3223).

The spelling of 20731150 in words is "twenty million, seven hundred thirty-one thousand, one hundred fifty".