18960606981 has 16 divisors (see below), whose sum is σ = 28213540800. Its totient is φ = 12584715984.

The previous prime is 18960606979. The next prime is 18960606997.

18960606981 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18960606981 - 2¹ = 18960606979 is a prime.

It is a super-2 number, since 2×18960606981² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18960606941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1540666 + ... + 1552923.

It is an arithmetic number, because the mean of its divisors is an integer number (1763346300).

Almost surely, 2^18960606981 is an apocalyptic number.

It is an amenable number.

18960606981 is a deficient number, since it is larger than the sum of its proper divisors (9252933819).

18960606981 is a wasteful number, since it uses less digits than its factorization.

18960606981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093825 (or 3093819 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The spelling of 18960606981 in words is "eighteen billion, nine hundred sixty million, six hundred six thousand, nine hundred eighty-one".