18746217434 has 24 divisors (see below), whose sum is σ = 32754625920. Its totient is φ = 8023190616.

The previous prime is 18746217431. The next prime is 18746217493. The reversal of 18746217434 is 43471264781.

It is not an unprimeable number, because it can be changed into a prime (18746217431) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 57002 + ... + 201845.

It is an arithmetic number, because the mean of its divisors is an integer number (1364776080).

Almost surely, 2^18746217434 is an apocalyptic number.

18746217434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18746217434 is a deficient number, since it is larger than the sum of its proper divisors (14008408486).

18746217434 is a wasteful number, since it uses less digits than its factorization.

18746217434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259602 (or 259595 counting only the distinct ones).

The product of its digits is 903168, while the sum is 47.

The spelling of 18746217434 in words is "eighteen billion, seven hundred forty-six million, two hundred seventeen thousand, four hundred thirty-four".