18147477379 has 4 divisors (see below), whose sum is σ = 18148634560. Its totient is φ = 18146320200.

The previous prime is 18147477367. The next prime is 18147477473. The reversal of 18147477379 is 97377474181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97377474181 = 13 ⋅7490574937.

It is a cyclic number.

It is not a de Polignac number, because 18147477379 - 2⁵ = 18147477347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18147477479) 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, 554739 + ... + 586540.

It is an arithmetic number, because the mean of its divisors is an integer number (4537158640).

Almost surely, 2^18147477379 is an apocalyptic number.

18147477379 is a deficient number, since it is larger than the sum of its proper divisors (1157181).

18147477379 is a wasteful number, since it uses less digits than its factorization.

18147477379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157180.

The product of its digits is 8297856, while the sum is 58.

The spelling of 18147477379 in words is "eighteen billion, one hundred forty-seven million, four hundred seventy-seven thousand, three hundred seventy-nine".