18846377401 has 4 divisors (see below), whose sum is σ = 18869112100. Its totient is φ = 18823642704.

The previous prime is 18846377371. The next prime is 18846377423. The reversal of 18846377401 is 10477364881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10477364881 = 102359².

It can be written as a sum of positive squares in 2 ways, for example, as 13018581801 + 5827795600 = 114099^2 + 76340^2 .

It is a cyclic number.

It is not a de Polignac number, because 18846377401 - 2¹³ = 18846369209 is a prime.

It is a super-2 number, since 2×18846377401² (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 (18846377441) 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, 11366106 + ... + 11367763.

It is an arithmetic number, because the mean of its divisors is an integer number (4717278025).

Almost surely, 2^18846377401 is an apocalyptic number.

It is an amenable number.

18846377401 is a deficient number, since it is larger than the sum of its proper divisors (22734699).

18846377401 is an equidigital number, since it uses as much as digits as its factorization.

18846377401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22734698.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 18846377401 in words is "eighteen billion, eight hundred forty-six million, three hundred seventy-seven thousand, four hundred one".