20199391618038 has 16 divisors (see below), whose sum is σ = 40399533938736. Its totient is φ = 6733005422240.

The previous prime is 20199391618001. The next prime is 20199391618061. The reversal of 20199391618038 is 83081619399102.

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, 30929181 + ... + 31575512.

It is an arithmetic number, because the mean of its divisors is an integer number (2524970871171).

Almost surely, 2^{20199391618038} is an apocalyptic number.

20199391618038 is an abundant number, since it is smaller than the sum of its proper divisors (20200142320698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20199391618038 is a wasteful number, since it uses less digits than its factorization.

20199391618038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62558559.

The product of its (nonzero) digits is 5038848, while the sum is 60.

The spelling of 20199391618038 in words is "twenty trillion, one hundred ninety-nine billion, three hundred ninety-one million, six hundred eighteen thousand, thirty-eight".