18929299897 has 8 divisors (see below), whose sum is σ = 19758430080. Its totient is φ = 18100679520.

The previous prime is 18929299843. The next prime is 18929299957. The reversal of 18929299897 is 79899292981.

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 18929299897 - 2⁷ = 18929299769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18929299097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50572 + ... + 201037.

It is an arithmetic number, because the mean of its divisors is an integer number (2469803760).

Almost surely, 2^18929299897 is an apocalyptic number.

It is an amenable number.

18929299897 is a deficient number, since it is larger than the sum of its proper divisors (829130183).

18929299897 is a wasteful number, since it uses less digits than its factorization.

18929299897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254903.

The product of its digits is 105815808, while the sum is 73.

The spelling of 18929299897 in words is "eighteen billion, nine hundred twenty-nine million, two hundred ninety-nine thousand, eight hundred ninety-seven".