18872638702 has 4 divisors (see below), whose sum is σ = 28308958056. Its totient is φ = 9436319350.

The previous prime is 18872638693. The next prime is 18872638703. The reversal of 18872638702 is 20783627881.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18872638702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18872638703) by changing a digit.

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 as a sum of consecutive naturals, namely, 4718159674 + ... + 4718159677.

It is an arithmetic number, because the mean of its divisors is an integer number (7077239514).

Almost surely, 2^18872638702 is an apocalyptic number.

18872638702 is a deficient number, since it is larger than the sum of its proper divisors (9436319354).

18872638702 is an equidigital number, since it uses as much as digits as its factorization.

18872638702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9436319353.

The product of its (nonzero) digits is 1806336, while the sum is 52.

The spelling of 18872638702 in words is "eighteen billion, eight hundred seventy-two million, six hundred thirty-eight thousand, seven hundred two".