20151436200123 has 8 divisors (see below), whose sum is σ = 26870323321408. Its totient is φ = 13433419939464.

The previous prime is 20151436200113. The next prime is 20151436200151. The reversal of 20151436200123 is 32100263415102.

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

It is not a de Polignac number, because 20151436200123 - 2⁹ = 20151436199611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20151436200113) 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, 217661161 + ... + 217753722.

It is an arithmetic number, because the mean of its divisors is an integer number (3358790415176).

Almost surely, 2^{20151436200123} is an apocalyptic number.

20151436200123 is a deficient number, since it is larger than the sum of its proper divisors (6718887121285).

20151436200123 is a wasteful number, since it uses less digits than its factorization.

20151436200123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435430313.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 20151436200123 its reverse (32100263415102), we get a palindrome (52251699615225).

The spelling of 20151436200123 in words is "twenty trillion, one hundred fifty-one billion, four hundred thirty-six million, two hundred thousand, one hundred twenty-three".