204747081 has 64 divisors (see below), whose sum is σ = 359976960. Its totient is φ = 100362240.

The previous prime is 204747079. The next prime is 204747083. The reversal of 204747081 is 180747402.

It is an interprime number because it is at equal distance from previous prime (204747079) and next prime (204747083).

It is not a de Polignac number, because 204747081 - 2¹ = 204747079 is a prime.

It is a super-2 number, since 2×204747081² = 83842734356041122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (204747083) 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 in 63 ways as a sum of consecutive naturals, for example, 472641 + ... + 473073.

It is an arithmetic number, because the mean of its divisors is an integer number (5624640).

Almost surely, 2^204747081 is an apocalyptic number.

204747081 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

204747081 is a deficient number, since it is larger than the sum of its proper divisors (155229879).

204747081 is a wasteful number, since it uses less digits than its factorization.

204747081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566.

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 204747081 is about 14308.9860227760. The cubic root of 204747081 is about 589.3942658093.

The spelling of 204747081 in words is "two hundred four million, seven hundred forty-seven thousand, eighty-one".