18668288435 has 16 divisors (see below), whose sum is σ = 22497773760. Its totient is φ = 14870835840.

The previous prime is 18668288389. The next prime is 18668288437. The reversal of 18668288435 is 53488286681.

It is a happy number.

It is not a de Polignac number, because 18668288435 - 2¹⁰ = 18668287411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18668288437) 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, 1927505 + ... + 1937165.

It is an arithmetic number, because the mean of its divisors is an integer number (1406110860).

Almost surely, 2^18668288435 is an apocalyptic number.

18668288435 is a deficient number, since it is larger than the sum of its proper divisors (3829485325).

18668288435 is a wasteful number, since it uses less digits than its factorization.

18668288435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11278.

The product of its digits is 17694720, while the sum is 59.

The spelling of 18668288435 in words is "eighteen billion, six hundred sixty-eight million, two hundred eighty-eight thousand, four hundred thirty-five".