204245423623 has 4 divisors (see below), whose sum is σ = 204258771760. Its totient is φ = 204232075488.

The previous prime is 204245423573. The next prime is 204245423677. The reversal of 204245423623 is 326324542402.

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

It is a cyclic number.

It is not a de Polignac number, because 204245423623 - 2²¹ = 204243326471 is a prime.

It is a super-2 number, since 2×204245423623² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204245424623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6651090 + ... + 6681727.

It is an arithmetic number, because the mean of its divisors is an integer number (51064692940).

Almost surely, 2^204245423623 is an apocalyptic number.

204245423623 is a deficient number, since it is larger than the sum of its proper divisors (13348137).

204245423623 is a wasteful number, since it uses less digits than its factorization.

204245423623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13348136.

The product of its (nonzero) digits is 276480, while the sum is 37.

The spelling of 204245423623 in words is "two hundred four billion, two hundred forty-five million, four hundred twenty-three thousand, six hundred twenty-three".