18720464606 has 16 divisors (see below), whose sum is σ = 28740150384. Its totient is φ = 9140511744.

The previous prime is 18720464597. The next prime is 18720464629. The reversal of 18720464606 is 60646402781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407600 + ... + 451196.

It is an arithmetic number, because the mean of its divisors is an integer number (1796259399).

Almost surely, 2^18720464606 is an apocalyptic number.

18720464606 is a deficient number, since it is larger than the sum of its proper divisors (10019685778).

18720464606 is a wasteful number, since it uses less digits than its factorization.

18720464606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48635.

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 18720464606 in words is "eighteen billion, seven hundred twenty million, four hundred sixty-four thousand, six hundred six".