205904906730 has 48 divisors (see below), whose sum is σ = 535493687040. Its totient is φ = 54893520864.

The previous prime is 205904906693. The next prime is 205904906731. The reversal of 205904906730 is 37609409502.

It is a happy number.

205904906730 is a `hidden beast` number, since 2 + 0 + 5 + 90 + 490 + 6 + 73 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (205904906731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44851 + ... + 643289.

It is an arithmetic number, because the mean of its divisors is an integer number (11156118480).

Almost surely, 2^205904906730 is an apocalyptic number.

205904906730 is an abundant number, since it is smaller than the sum of its proper divisors (329588780310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205904906730 is a wasteful number, since it uses less digits than its factorization.

205904906730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602275 (or 602272 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 205904906730 in words is "two hundred five billion, nine hundred four million, nine hundred six thousand, seven hundred thirty".