204140402 has 4 divisors (see below), whose sum is σ = 306210606. Its totient is φ = 102070200.

The previous prime is 204140329. The next prime is 204140429. The reversal of 204140402 is 204041402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204041402 = 2 ⋅102020701.

It can be written as a sum of positive squares in only one way, i.e., 106110601 + 98029801 = 10301^2 + 9901^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51035099 + ... + 51035102.

Almost surely, 2^204140402 is an apocalyptic number.

204140402 is a deficient number, since it is larger than the sum of its proper divisors (102070204).

204140402 is a wasteful number, since it uses less digits than its factorization.

204140402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102070203.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 204140402 is about 14287.7710647952. The cubic root of 204140402 is about 588.8115519631.

Adding to 204140402 its reverse (204041402), we get a palindrome (408181804).

The spelling of 204140402 in words is "two hundred four million, one hundred forty thousand, four hundred two".