20313221554 has 8 divisors (see below), whose sum is σ = 30674328300. Its totient is φ = 10088445456.

The previous prime is 20313221549. The next prime is 20313221587. The reversal of 20313221554 is 45512231302.

It can be written as a sum of positive squares in 2 ways, for example, as 20312805529 + 416025 = 142523^2 + 645^2 .

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

It is a super-3 number, since 3×20313221554³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34082289 + ... + 34082884.

Almost surely, 2^20313221554 is an apocalyptic number.

20313221554 is a deficient number, since it is larger than the sum of its proper divisors (10361106746).

20313221554 is a wasteful number, since it uses less digits than its factorization.

20313221554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68165324.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 20313221554 its reverse (45512231302), we get a palindrome (65825452856).

The spelling of 20313221554 in words is "twenty billion, three hundred thirteen million, two hundred twenty-one thousand, five hundred fifty-four".