181013204 has 6 divisors (see below), whose sum is σ = 316773114. Its totient is φ = 90506600.

The previous prime is 181013153. The next prime is 181013207. The reversal of 181013204 is 402310181.

It can be written as a sum of positive squares in only one way, i.e., 173712400 + 7300804 = 13180^2 + 2702^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181013207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22626647 + ... + 22626654.

It is an arithmetic number, because the mean of its divisors is an integer number (52795519).

Almost surely, 2^181013204 is an apocalyptic number.

It is an amenable number.

181013204 is a deficient number, since it is larger than the sum of its proper divisors (135759910).

181013204 is a wasteful number, since it uses less digits than its factorization.

181013204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45253305 (or 45253303 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 181013204 is about 13454.1147609198. The cubic root of 181013204 is about 565.6790373940.

Adding to 181013204 its reverse (402310181), we get a palindrome (583323385).

The spelling of 181013204 in words is "one hundred eighty-one million, thirteen thousand, two hundred four".