20138900827 has 8 divisors (see below), whose sum is σ = 20355046400. Its totient is φ = 19923152040.

The previous prime is 20138900819. The next prime is 20138900897. The reversal of 20138900827 is 72800983102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20138900827 - 2³ = 20138900819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20138900827.

It is not an unprimeable number, because it can be changed into a prime (20138900897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3424 + ... + 200722.

It is an arithmetic number, because the mean of its divisors is an integer number (2544380800).

Almost surely, 2^20138900827 is an apocalyptic number.

20138900827 is a deficient number, since it is larger than the sum of its proper divisors (216145573).

20138900827 is a wasteful number, since it uses less digits than its factorization.

20138900827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198393.

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 20138900827 in words is "twenty billion, one hundred thirty-eight million, nine hundred thousand, eight hundred twenty-seven".