20015102642518 has 4 divisors (see below), whose sum is σ = 30022653963780. Its totient is φ = 10007551321258.

The previous prime is 20015102642489. The next prime is 20015102642533. The reversal of 20015102642518 is 81524620151002.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003775660628 + ... + 5003775660631.

It is an arithmetic number, because the mean of its divisors is an integer number (7505663490945).

Almost surely, 2^{20015102642518} is an apocalyptic number.

20015102642518 is a deficient number, since it is larger than the sum of its proper divisors (10007551321262).

20015102642518 is a wasteful number, since it uses less digits than its factorization.

20015102642518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10007551321261.

The product of its (nonzero) digits is 38400, while the sum is 37.

The spelling of 20015102642518 in words is "twenty trillion, fifteen billion, one hundred two million, six hundred forty-two thousand, five hundred eighteen".