18642488907 has 16 divisors (see below), whose sum is σ = 28415109632. Its totient is φ = 10650035520.

The previous prime is 18642488897. The next prime is 18642488911. The reversal of 18642488907 is 70988424681.

It is not a de Polignac number, because 18642488907 - 2¹⁴ = 18642472523 is a prime.

It is the 136538-th Hogben number.

It is not an unprimeable number, because it can be changed into a prime (18642488987) by changing a digit.

It is a nontrivial repunit in base 136537.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34594 + ... + 196167.

It is an arithmetic number, because the mean of its divisors is an integer number (1775944352).

Almost surely, 2^18642488907 is an apocalyptic number.

18642488907 is a deficient number, since it is larger than the sum of its proper divisors (9772620725).

18642488907 is a wasteful number, since it uses less digits than its factorization.

18642488907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234618.

The product of its (nonzero) digits is 6193152, while the sum is 57.

The spelling of 18642488907 in words is "eighteen billion, six hundred forty-two million, four hundred eighty-eight thousand, nine hundred seven".