20311132 has 6 divisors (see below), whose sum is σ = 35544488. Its totient is φ = 10155564.

The previous prime is 20311129. The next prime is 20311177. The reversal of 20311132 is 23111302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2538888 + ... + 2538895.

Almost surely, 2^20311132 is an apocalyptic number.

It is an amenable number.

20311132 is a deficient number, since it is larger than the sum of its proper divisors (15233356).

20311132 is a wasteful number, since it uses less digits than its factorization.

20311132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5077787 (or 5077785 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 20311132 is about 4506.7873258009. The cubic root of 20311132 is about 272.8420953951.

Adding to 20311132 its reverse (23111302), we get a palindrome (43422434).

The spelling of 20311132 in words is "twenty million, three hundred eleven thousand, one hundred thirty-two".