18053421712 has 10 divisors (see below), whose sum is σ = 34978504598. Its totient is φ = 9026710848.

The previous prime is 18053421667. The next prime is 18053421721. The reversal of 18053421712 is 21712435081.

It can be written as a sum of positive squares in only one way, i.e., 17674107136 + 379314576 = 132944^2 + 19476^2 .

It is a super-2 number, since 2×18053421712² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564169413 + ... + 564169444.

Almost surely, 2^18053421712 is an apocalyptic number.

It is an amenable number.

18053421712 is a deficient number, since it is larger than the sum of its proper divisors (16925082886).

18053421712 is a wasteful number, since it uses less digits than its factorization.

18053421712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128338865 (or 1128338859 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

Adding to 18053421712 its reverse (21712435081), we get a palindrome (39765856793).

The spelling of 18053421712 in words is "eighteen billion, fifty-three million, four hundred twenty-one thousand, seven hundred twelve".