205420474 has 16 divisors (see below), whose sum is σ = 358795008. Its totient is φ = 86375952.

The previous prime is 205420451. The next prime is 205420483. The reversal of 205420474 is 474024502.

It is a happy number.

It is a super-2 number, since 2×205420474² = 84395142276769352, which contains 22 as substring.

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, 137682 + ... + 139165.

It is an arithmetic number, because the mean of its divisors is an integer number (22424688).

Almost surely, 2^205420474 is an apocalyptic number.

205420474 is a deficient number, since it is larger than the sum of its proper divisors (153374534).

205420474 is a wasteful number, since it uses less digits than its factorization.

205420474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276909.

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 205420474 is about 14332.4971306468. The cubic root of 205420474 is about 590.0397119684.

Adding to 205420474 its reverse (474024502), we get a palindrome (679444976).

The spelling of 205420474 in words is "two hundred five million, four hundred twenty thousand, four hundred seventy-four".