205421046370 has 16 divisors (see below), whose sum is σ = 369770300280. Its totient is φ = 82165659264.

The previous prime is 205421046359. The next prime is 205421046427. The reversal of 205421046370 is 73640124502.

205421046370 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 54178614169 + 151242432201 = 232763^2 + 388899^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17427 + ... + 641206.

Almost surely, 2^205421046370 is an apocalyptic number.

205421046370 is a deficient number, since it is larger than the sum of its proper divisors (164349253910).

205421046370 is a wasteful number, since it uses less digits than its factorization.

205421046370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689829.

The product of its (nonzero) digits is 40320, while the sum is 34.

The spelling of 205421046370 in words is "two hundred five billion, four hundred twenty-one million, forty-six thousand, three hundred seventy".