20150408871 has 6 divisors (see below), whose sum is σ = 29106146160. Its totient is φ = 13433605908.

The previous prime is 20150408869. The next prime is 20150408891. The reversal of 20150408871 is 17880405102.

20150408871 is a `hidden beast` number, since 2 + 0 + 1 + 504 + 0 + 88 + 71 = 666.

It is not a de Polignac number, because 20150408871 - 2¹ = 20150408869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20150408851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1119467151 + ... + 1119467168.

It is an arithmetic number, because the mean of its divisors is an integer number (4851024360).

Almost surely, 2^20150408871 is an apocalyptic number.

20150408871 is a deficient number, since it is larger than the sum of its proper divisors (8955737289).

20150408871 is a wasteful number, since it uses less digits than its factorization.

20150408871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238934325 (or 2238934322 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The spelling of 20150408871 in words is "twenty billion, one hundred fifty million, four hundred eight thousand, eight hundred seventy-one".