20151789109159 has 4 divisors (see below), whose sum is σ = 20347437547216. Its totient is φ = 19956140671104.

The previous prime is 20151789109141. The next prime is 20151789109201. The reversal of 20151789109159 is 95190198715102.

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

It is a cyclic number.

It is not a de Polignac number, because 20151789109159 - 2²³ = 20151780720551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20151789106159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97824218874 + ... + 97824219079.

It is an arithmetic number, because the mean of its divisors is an integer number (5086859386804).

Almost surely, 2^{20151789109159} is an apocalyptic number.

20151789109159 is a deficient number, since it is larger than the sum of its proper divisors (195648438057).

20151789109159 is a wasteful number, since it uses less digits than its factorization.

20151789109159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195648438056.

The product of its (nonzero) digits is 2041200, while the sum is 58.

The spelling of 20151789109159 in words is "twenty trillion, one hundred fifty-one billion, seven hundred eighty-nine million, one hundred nine thousand, one hundred fifty-nine".