18142471405 has 8 divisors (see below), whose sum is σ = 22359370392. Its totient is φ = 14121707328.

The previous prime is 18142471381. The next prime is 18142471429. The reversal of 18142471405 is 50417424181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18142471381) and next prime (18142471429).

It can be written as a sum of positive squares in 4 ways, for example, as 7371767881 + 10770703524 = 85859^2 + 103782^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18142471405 - 2²³ = 18134082797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49033522 + ... + 49033891.

It is an arithmetic number, because the mean of its divisors is an integer number (2794921299).

Almost surely, 2^18142471405 is an apocalyptic number.

It is an amenable number.

18142471405 is a deficient number, since it is larger than the sum of its proper divisors (4216898987).

18142471405 is an equidigital number, since it uses as much as digits as its factorization.

18142471405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98067455.

The product of its (nonzero) digits is 35840, while the sum is 37.

Adding to 18142471405 its reverse (50417424181), we get a palindrome (68559895586).

The spelling of 18142471405 in words is "eighteen billion, one hundred forty-two million, four hundred seventy-one thousand, four hundred five".