1813540234 has 16 divisors (see below), whose sum is σ = 3123802080. Its totient is φ = 780950160.

The previous prime is 1813540231. The next prime is 1813540243. The reversal of 1813540234 is 4320453181.

It is a junction number, because it is equal to n+sod(n) for n = 1813540196 and 1813540205.

It is not an unprimeable number, because it can be changed into a prime (1813540231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2168889 + ... + 2169724.

It is an arithmetic number, because the mean of its divisors is an integer number (195237630).

Almost surely, 2^1813540234 is an apocalyptic number.

1813540234 is a deficient number, since it is larger than the sum of its proper divisors (1310261846).

1813540234 is a wasteful number, since it uses less digits than its factorization.

1813540234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4338645.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 1813540234 is about 42585.6810911837. The cubic root of 1813540234 is about 1219.4829471604.

The spelling of 1813540234 in words is "one billion, eight hundred thirteen million, five hundred forty thousand, two hundred thirty-four".