16381307247 has 4 divisors (see below), whose sum is σ = 21841743000. Its totient is φ = 10920871496.

The previous prime is 16381307213. The next prime is 16381307251. The reversal of 16381307247 is 74270318361.

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

It is a cyclic number.

It is not a de Polignac number, because 16381307247 - 2⁶ = 16381307183 is a prime.

It is a super-2 number, since 2×16381307247² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16381307199 and 16381307208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16381307347) 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, 2730217872 + ... + 2730217877.

It is an arithmetic number, because the mean of its divisors is an integer number (5460435750).

Almost surely, 2^16381307247 is an apocalyptic number.

16381307247 is a deficient number, since it is larger than the sum of its proper divisors (5460435753).

16381307247 is an equidigital number, since it uses as much as digits as its factorization.

16381307247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5460435752.

The product of its (nonzero) digits is 169344, while the sum is 42.

The spelling of 16381307247 in words is "sixteen billion, three hundred eighty-one million, three hundred seven thousand, two hundred forty-seven".