20401312 has 24 divisors (see below), whose sum is σ = 40540500. Its totient is φ = 10105344.

The previous prime is 20401291. The next prime is 20401321. The reversal of 20401312 is 21310402.

It can be written as a sum of positive squares in 2 ways, for example, as 20394256 + 7056 = 4516^2 + 84^2 .

It is a super-3 number, since 3×20401312³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20401292 and 20401301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564 + ... + 6412.

Almost surely, 2^20401312 is an apocalyptic number.

It is an amenable number.

20401312 is a deficient number, since it is larger than the sum of its proper divisors (20139188).

20401312 is a wasteful number, since it uses less digits than its factorization.

20401312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968 (or 5960 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20401312 is about 4516.7811547605. The cubic root of 20401312 is about 273.2452991660.

Adding to 20401312 its reverse (21310402), we get a palindrome (41711714).

The spelling of 20401312 in words is "twenty million, four hundred one thousand, three hundred twelve".