18412637434 has 8 divisors (see below), whose sum is σ = 27620884980. Its totient is φ = 9205675776.

The previous prime is 18412637407. The next prime is 18412637437. The reversal of 18412637434 is 43473621481.

18412637434 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 16748242225 + 1664395209 = 129415^2 + 40797^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18412637437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284839 + ... + 343450.

Almost surely, 2^18412637434 is an apocalyptic number.

18412637434 is a deficient number, since it is larger than the sum of its proper divisors (9208247546).

18412637434 is a wasteful number, since it uses less digits than its factorization.

18412637434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642944.

The product of its digits is 387072, while the sum is 43.

The spelling of 18412637434 in words is "eighteen billion, four hundred twelve million, six hundred thirty-seven thousand, four hundred thirty-four".