20361450331 has 4 divisors (see below), whose sum is σ = 20361768664. Its totient is φ = 20361132000.

The previous prime is 20361450289. The next prime is 20361450397. The reversal of 20361450331 is 13305416302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20361450331 is a prime.

It is a super-2 number, since 2×20361450331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20361450331.

It is not an unprimeable number, because it can be changed into a prime (20361450631) 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 3 ways as a sum of consecutive naturals, for example, 26190 + ... + 203491.

It is an arithmetic number, because the mean of its divisors is an integer number (5090442166).

Almost surely, 2^20361450331 is an apocalyptic number.

20361450331 is a deficient number, since it is larger than the sum of its proper divisors (318333).

20361450331 is an equidigital number, since it uses as much as digits as its factorization.

20361450331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318332.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 20361450331 its reverse (13305416302), we get a palindrome (33666866633).

The spelling of 20361450331 in words is "twenty billion, three hundred sixty-one million, four hundred fifty thousand, three hundred thirty-one".