18469299427 has 4 divisors (see below), whose sum is σ = 18481193640. Its totient is φ = 18457405216.

The previous prime is 18469299421. The next prime is 18469299449. The reversal of 18469299427 is 72499296481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72499296481 = 47 ⋅1542538223.

It is a cyclic number.

It is not a de Polignac number, because 18469299427 - 2¹⁵ = 18469266659 is a prime.

It is a super-2 number, since 2×18469299427² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18469299421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5944777 + ... + 5947882.

It is an arithmetic number, because the mean of its divisors is an integer number (4620298410).

Almost surely, 2^18469299427 is an apocalyptic number.

18469299427 is a deficient number, since it is larger than the sum of its proper divisors (11894213).

18469299427 is a wasteful number, since it uses less digits than its factorization.

18469299427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11894212.

The product of its digits is 15676416, while the sum is 61.

The spelling of 18469299427 in words is "eighteen billion, four hundred sixty-nine million, two hundred ninety-nine thousand, four hundred twenty-seven".