20631398341 has 8 divisors (see below), whose sum is σ = 21453416280. Its totient is φ = 19816753152.

The previous prime is 20631398321. The next prime is 20631398377. The reversal of 20631398341 is 14389313602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2445797025 + 18185601316 = 49455^2 + 134854^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20631398341 - 2¹¹ = 20631396293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20631398294 and 20631398303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20631398321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1837480 + ... + 1848673.

It is an arithmetic number, because the mean of its divisors is an integer number (2681677035).

Almost surely, 2^20631398341 is an apocalyptic number.

It is an amenable number.

20631398341 is a deficient number, since it is larger than the sum of its proper divisors (822017939).

20631398341 is a wasteful number, since it uses less digits than its factorization.

20631398341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3686375.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 20631398341 in words is "twenty billion, six hundred thirty-one million, three hundred ninety-eight thousand, three hundred forty-one".