205036871894 has 4 divisors (see below), whose sum is σ = 307555307844. Its totient is φ = 102518435946.

The previous prime is 205036871887. The next prime is 205036871899. The reversal of 205036871894 is 498178630502.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205036871899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51259217972 + ... + 51259217975.

It is an arithmetic number, because the mean of its divisors is an integer number (76888826961).

It is a 1-persistent number, because it is pandigital, but 2⋅205036871894 = 410073743788 is not.

Almost surely, 2^205036871894 is an apocalyptic number.

205036871894 is a deficient number, since it is larger than the sum of its proper divisors (102518435950).

205036871894 is a wasteful number, since it uses less digits than its factorization.

205036871894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102518435949.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 205036871894 in words is "two hundred five billion, thirty-six million, eight hundred seventy-one thousand, eight hundred ninety-four".