203056581923 has 16 divisors (see below), whose sum is σ = 231653701440. Its totient is φ = 176324238336.

The previous prime is 203056581881. The next prime is 203056581947. The reversal of 203056581923 is 329185650302.

It is a Cunningham number, because it is equal to 450618²-1.

It is a cyclic number.

It is not a de Polignac number, because 203056581923 - 2¹² = 203056577827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203056581953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225311 + ... + 675927.

It is an arithmetic number, because the mean of its divisors is an integer number (14478356340).

Almost surely, 2^203056581923 is an apocalyptic number.

203056581923 is a deficient number, since it is larger than the sum of its proper divisors (28597119517).

203056581923 is a wasteful number, since it uses less digits than its factorization.

203056581923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452686.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 203056581923 in words is "two hundred three billion, fifty-six million, five hundred eighty-one thousand, nine hundred twenty-three".