16234637434 has 4 divisors (see below), whose sum is σ = 24351956154. Its totient is φ = 8117318716.

The previous prime is 16234637431. The next prime is 16234637453. The reversal of 16234637434 is 43473643261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43473643261 = 17 ⋅2557273133.

It can be written as a sum of positive squares in only one way, i.e., 14454050625 + 1780586809 = 120225^2 + 42197^2 .

It is a super-2 number, since 2×16234637434² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16234637431) 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 as a sum of consecutive naturals, namely, 4058659357 + ... + 4058659360.

Almost surely, 2^16234637434 is an apocalyptic number.

16234637434 is a deficient number, since it is larger than the sum of its proper divisors (8117318720).

16234637434 is an equidigital number, since it uses as much as digits as its factorization.

16234637434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8117318719.

The product of its digits is 870912, while the sum is 43.

The spelling of 16234637434 in words is "sixteen billion, two hundred thirty-four million, six hundred thirty-seven thousand, four hundred thirty-four".