18642352370 has 32 divisors (see below), whose sum is σ = 34032061872. Its totient is φ = 7351299072.

The previous prime is 18642352363. The next prime is 18642352387. The reversal of 18642352370 is 7325324681.

It is a Cunningham number, because it is equal to 136537²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 18395768161 + 246584209 = 135631^2 + 15703^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1975784 + ... + 1985196.

Almost surely, 2^18642352370 is an apocalyptic number.

18642352370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18642352370 is a deficient number, since it is larger than the sum of its proper divisors (15389709502).

18642352370 is a wasteful number, since it uses less digits than its factorization.

18642352370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12206.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 18642352370 in words is "eighteen billion, six hundred forty-two million, three hundred fifty-two thousand, three hundred seventy".