18342222101 has 4 divisors (see below), whose sum is σ = 20962539552. Its totient is φ = 15721904652.

The previous prime is 18342222089. The next prime is 18342222149. The reversal of 18342222101 is 10122224381.

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: 10122224381 = 43 ⋅235400567.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18342222101 is a prime.

It is a super-2 number, since 2×18342222101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18342222191) 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, 1310158715 + ... + 1310158728.

It is an arithmetic number, because the mean of its divisors is an integer number (5240634888).

Almost surely, 2^18342222101 is an apocalyptic number.

It is an amenable number.

18342222101 is a deficient number, since it is larger than the sum of its proper divisors (2620317451).

18342222101 is an equidigital number, since it uses as much as digits as its factorization.

18342222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620317450.

The product of its (nonzero) digits is 1536, while the sum is 26.

Adding to 18342222101 its reverse (10122224381), we get a palindrome (28464446482).

The spelling of 18342222101 in words is "eighteen billion, three hundred forty-two million, two hundred twenty-two thousand, one hundred one".