20401213313 has 4 divisors (see below), whose sum is σ = 21970537428. Its totient is φ = 18831889200.

The previous prime is 20401213297. The next prime is 20401213373. The reversal of 20401213313 is 31331210402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 888755344 + 19512457969 = 29812^2 + 139687^2 .

It is a cyclic number.

It is not a de Polignac number, because 20401213313 - 2⁴ = 20401213297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20401213373) 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, 784662038 + ... + 784662063.

It is an arithmetic number, because the mean of its divisors is an integer number (5492634357).

Almost surely, 2^20401213313 is an apocalyptic number.

It is an amenable number.

20401213313 is a deficient number, since it is larger than the sum of its proper divisors (1569324115).

20401213313 is a wasteful number, since it uses less digits than its factorization.

20401213313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569324114.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20401213313 its reverse (31331210402), we get a palindrome (51732423715).

The spelling of 20401213313 in words is "twenty billion, four hundred one million, two hundred thirteen thousand, three hundred thirteen".