17812054397 has 4 divisors (see below), whose sum is σ = 18037523520. Its totient is φ = 17586585276.

The previous prime is 17812054357. The next prime is 17812054399. The reversal of 17812054397 is 79345021871.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79345021871 = 151 ⋅525463721.

It is a cyclic number.

It is not a de Polignac number, because 17812054397 - 2¹⁶ = 17811988861 is a prime.

It is a pancake number, because a pancake can be divided into 17812054397 parts by 188743 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17812054399) 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, 112734443 + ... + 112734600.

It is an arithmetic number, because the mean of its divisors is an integer number (4509380880).

Almost surely, 2^17812054397 is an apocalyptic number.

It is an amenable number.

17812054397 is a deficient number, since it is larger than the sum of its proper divisors (225469123).

17812054397 is an equidigital number, since it uses as much as digits as its factorization.

17812054397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225469122.

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 17812054397 in words is "seventeen billion, eight hundred twelve million, fifty-four thousand, three hundred ninety-seven".