204054677993 has 4 divisors (see below), whose sum is σ = 204455571780. Its totient is φ = 203653784208.

The previous prime is 204054677987. The next prime is 204054678013. The reversal of 204054677993 is 399776450402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 117246662569 + 86808015424 = 342413^2 + 294632^2 .

It is a cyclic number.

It is not a de Polignac number, because 204054677993 - 2²⁶ = 203987569129 is a prime.

It is a super-2 number, since 2×204054677993² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204054671993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200446130 + ... + 200447147.

It is an arithmetic number, because the mean of its divisors is an integer number (51113892945).

Almost surely, 2^204054677993 is an apocalyptic number.

It is an amenable number.

204054677993 is a deficient number, since it is larger than the sum of its proper divisors (400893787).

204054677993 is an equidigital number, since it uses as much as digits as its factorization.

204054677993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400893786.

The product of its (nonzero) digits is 11430720, while the sum is 56.

The spelling of 204054677993 in words is "two hundred four billion, fifty-four million, six hundred seventy-seven thousand, nine hundred ninety-three".