20332013 has 4 divisors (see below), whose sum is σ = 21896028. Its totient is φ = 18768000.

The previous prime is 20331989. The next prime is 20332043. The reversal of 20332013 is 31023302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31023302 = 2 ⋅15511651.

It can be written as a sum of positive squares in 2 ways, for example, as 2244004 + 18088009 = 1498^2 + 4253^2 .

It is a cyclic number.

It is not a de Polignac number, because 20332013 - 2¹² = 20327917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20332043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781988 + ... + 782013.

It is an arithmetic number, because the mean of its divisors is an integer number (5474007).

Almost surely, 2^20332013 is an apocalyptic number.

It is an amenable number.

20332013 is a deficient number, since it is larger than the sum of its proper divisors (1564015).

20332013 is a wasteful number, since it uses less digits than its factorization.

20332013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564014.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 20332013 is about 4509.1033476735. The cubic root of 20332013 is about 272.9355624415.

Adding to 20332013 its reverse (31023302), we get a palindrome (51355315).

The spelling of 20332013 in words is "twenty million, three hundred thirty-two thousand, thirteen".