204040454 has 4 divisors (see below), whose sum is σ = 306060684. Its totient is φ = 102020226.

The previous prime is 204040427. The next prime is 204040457. The reversal of 204040454 is 454040402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 454040402 = 2 ⋅227020201.

It is a super-2 number, since 2×204040454² = 83265013737052232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204040457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010112 + ... + 51010115.

It is an arithmetic number, because the mean of its divisors is an integer number (76515171).

Almost surely, 2^204040454 is an apocalyptic number.

204040454 is a deficient number, since it is larger than the sum of its proper divisors (102020230).

204040454 is a wasteful number, since it uses less digits than its factorization.

204040454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102020229.

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 204040454 is about 14284.2729601475. The cubic root of 204040454 is about 588.7154414047.

Adding to 204040454 its reverse (454040402), we get a palindrome (658080856).

The spelling of 204040454 in words is "two hundred four million, forty thousand, four hundred fifty-four".