20541263331 has 4 divisors (see below), whose sum is σ = 27388351112. Its totient is φ = 13694175552.

The previous prime is 20541263329. The next prime is 20541263333. The reversal of 20541263331 is 13336214502.

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

It is an interprime number because it is at equal distance from previous prime (20541263329) and next prime (20541263333).

It is not a de Polignac number, because 20541263331 - 2¹ = 20541263329 is a prime.

It is a super-2 number, since 2×20541263331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20541263333) 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, 3423543886 + ... + 3423543891.

It is an arithmetic number, because the mean of its divisors is an integer number (6847087778).

Almost surely, 2^20541263331 is an apocalyptic number.

20541263331 is a deficient number, since it is larger than the sum of its proper divisors (6847087781).

20541263331 is an equidigital number, since it uses as much as digits as its factorization.

20541263331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6847087780.

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 20541263331 its reverse (13336214502), we get a palindrome (33877477833).

The spelling of 20541263331 in words is "twenty billion, five hundred forty-one million, two hundred sixty-three thousand, three hundred thirty-one".