18986956955 has 8 divisors (see below), whose sum is σ = 23040352800. Its totient is φ = 15018895936.

The previous prime is 18986956943. The next prime is 18986956979. The reversal of 18986956955 is 55965968981.

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 18986956955 - 2⁸ = 18986956699 is a prime.

It is a super-2 number, since 2×18986956955² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21333215 + ... + 21334104.

It is an arithmetic number, because the mean of its divisors is an integer number (2880044100).

Almost surely, 2^18986956955 is an apocalyptic number.

18986956955 is a deficient number, since it is larger than the sum of its proper divisors (4053395845).

18986956955 is an equidigital number, since it uses as much as digits as its factorization.

18986956955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42667413.

The product of its digits is 209952000, while the sum is 71.

The spelling of 18986956955 in words is "eighteen billion, nine hundred eighty-six million, nine hundred fifty-six thousand, nine hundred fifty-five".