18734858553434 has 4 divisors (see below), whose sum is σ = 28102287830154. Its totient is φ = 9367429276716.

The previous prime is 18734858553337. The next prime is 18734858553469. The reversal of 18734858553434 is 43435585843781.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13516306661209 + 5218551892225 = 3676453^2 + 2284415^2 .

It is a super-2 number, since 2×18734858553434² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4683714638357 + ... + 4683714638360.

Almost surely, 2^{18734858553434} is an apocalyptic number.

18734858553434 is a deficient number, since it is larger than the sum of its proper divisors (9367429276720).

18734858553434 is an equidigital number, since it uses as much as digits as its factorization.

18734858553434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9367429276719.

The product of its digits is 774144000, while the sum is 68.

The spelling of 18734858553434 in words is "eighteen trillion, seven hundred thirty-four billion, eight hundred fifty-eight million, five hundred fifty-three thousand, four hundred thirty-four".