18620485729 has 8 divisors (see below), whose sum is σ = 18862885760. Its totient is φ = 18378253296.

The previous prime is 18620485711. The next prime is 18620485753. The reversal of 18620485729 is 92758402681.

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 18620485729 - 2²¹ = 18618388577 is a prime.

It is a super-2 number, since 2×18620485729² (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 (18620485759) 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, 190042 + ... + 270844.

It is an arithmetic number, because the mean of its divisors is an integer number (2357860720).

Almost surely, 2^18620485729 is an apocalyptic number.

It is an amenable number.

18620485729 is a deficient number, since it is larger than the sum of its proper divisors (242400031).

18620485729 is an equidigital number, since it uses as much as digits as its factorization.

18620485729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83799.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 18620485729 in words is "eighteen billion, six hundred twenty million, four hundred eighty-five thousand, seven hundred twenty-nine".