20151115405203 has 8 divisors (see below), whose sum is σ = 27734868514816. Its totient is φ = 13000719616200.

The previous prime is 20151115405151. The next prime is 20151115405241. The reversal of 20151115405203 is 30250451115102.

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

It is not a de Polignac number, because 20151115405203 - 2⁶ = 20151115405139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20151115405243) 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, 108339330043 + ... + 108339330228.

It is an arithmetic number, because the mean of its divisors is an integer number (3466858564352).

Almost surely, 2^{20151115405203} is an apocalyptic number.

20151115405203 is a deficient number, since it is larger than the sum of its proper divisors (7583753109613).

20151115405203 is a wasteful number, since it uses less digits than its factorization.

20151115405203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216678660305.

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 20151115405203 in words is "twenty trillion, one hundred fifty-one billion, one hundred fifteen million, four hundred five thousand, two hundred three".