204830427739 has 6 divisors (see below), whose sum is σ = 238272130284. Its totient is φ = 175568938020.

The previous prime is 204830427727. The next prime is 204830427877. The reversal of 204830427739 is 937724038402.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-204830427739 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 4180212811 = 204830427739 / (2 + 0 + 4 + 8 + 3 + 0 + 4 + 2 + 7 + 7 + 3 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204830427692 and 204830427701.

It is not an unprimeable number, because it can be changed into a prime (204830427709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2090106357 + ... + 2090106454.

It is an arithmetic number, because the mean of its divisors is an integer number (39712021714).

Almost surely, 2^204830427739 is an apocalyptic number.

204830427739 is a deficient number, since it is larger than the sum of its proper divisors (33441702545).

204830427739 is an equidigital number, since it uses as much as digits as its factorization.

204830427739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180212825 (or 4180212818 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 204830427739 in words is "two hundred four billion, eight hundred thirty million, four hundred twenty-seven thousand, seven hundred thirty-nine".