20311376 has 10 divisors (see below), whose sum is σ = 39353322. Its totient is φ = 10155680.

The previous prime is 20311363. The next prime is 20311381. The reversal of 20311376 is 67311302.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19571776 + 739600 = 4424^2 + 860^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634715 + ... + 634746.

Almost surely, 2^20311376 is an apocalyptic number.

It is an amenable number.

20311376 is a deficient number, since it is larger than the sum of its proper divisors (19041946).

20311376 is a wasteful number, since it uses less digits than its factorization.

20311376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269469 (or 1269463 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 20311376 is about 4506.8143960008. The cubic root of 20311376 is about 272.8431879520.

Adding to 20311376 its reverse (67311302), we get a palindrome (87622678).

The spelling of 20311376 in words is "twenty million, three hundred eleven thousand, three hundred seventy-six".