18929198481 has 4 divisors (see below), whose sum is σ = 25238931312. Its totient is φ = 12619465652.

The previous prime is 18929198473. The next prime is 18929198501. The reversal of 18929198481 is 18489192981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18929198481 - 2³ = 18929198473 is a prime.

It is a super-2 number, since 2×18929198481² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18929198401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3154866411 + ... + 3154866416.

It is an arithmetic number, because the mean of its divisors is an integer number (6309732828).

Almost surely, 2^18929198481 is an apocalyptic number.

It is an amenable number.

18929198481 is a deficient number, since it is larger than the sum of its proper divisors (6309732831).

18929198481 is an equidigital number, since it uses as much as digits as its factorization.

18929198481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6309732830.

The product of its digits is 2985984, while the sum is 60.

The spelling of 18929198481 in words is "eighteen billion, nine hundred twenty-nine million, one hundred ninety-eight thousand, four hundred eighty-one".