20313133436401 has 4 divisors (see below), whose sum is σ = 21875682162292. Its totient is φ = 18750584710512.

The previous prime is 20313133436359. The next prime is 20313133436459. The reversal of 20313133436401 is 10463433131302.

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 2740680250000 + 17572453186401 = 1655500^2 + 4191951^2 .

It is a cyclic number.

It is not a de Polignac number, because 20313133436401 - 2¹³ = 20313133428209 is a prime.

It is a super-2 number, since 2×20313133436401² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20313133436471) 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, 781274362926 + ... + 781274362951.

It is an arithmetic number, because the mean of its divisors is an integer number (5468920540573).

Almost surely, 2^{20313133436401} is an apocalyptic number.

It is an amenable number.

20313133436401 is a deficient number, since it is larger than the sum of its proper divisors (1562548725891).

20313133436401 is a wasteful number, since it uses less digits than its factorization.

20313133436401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562548725890.

The product of its (nonzero) digits is 46656, while the sum is 34.

Adding to 20313133436401 its reverse (10463433131302), we get a palindrome (30776566567703).

The spelling of 20313133436401 in words is "twenty trillion, three hundred thirteen billion, one hundred thirty-three million, four hundred thirty-six thousand, four hundred one".