205401964 has 12 divisors (see below), whose sum is σ = 368220888. Its totient is φ = 100196000.

The previous prime is 205401961. The next prime is 205401971. The reversal of 205401964 is 469104502.

It is not an unprimeable number, because it can be changed into a prime (205401961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626062 + ... + 626389.

It is an arithmetic number, because the mean of its divisors is an integer number (30685074).

Almost surely, 2^205401964 is an apocalyptic number.

It is an amenable number.

205401964 is a deficient number, since it is larger than the sum of its proper divisors (162818924).

205401964 is a wasteful number, since it uses less digits than its factorization.

205401964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252496 (or 1252494 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 205401964 is about 14331.8513807533. The cubic root of 205401964 is about 590.0219890301.

The spelling of 205401964 in words is "two hundred five million, four hundred one thousand, nine hundred sixty-four".