30136813 has 12 divisors (see below), whose sum is σ = 35163072. Its totient is φ = 25753560.

The previous prime is 30136811. The next prime is 30136837. The reversal of 30136813 is 31863103.

It is a happy number.

It is not a de Polignac number, because 30136813 - 2¹ = 30136811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30136811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20406 + ... + 21832.

It is an arithmetic number, because the mean of its divisors is an integer number (2930256).

Almost surely, 2^30136813 is an apocalyptic number.

It is an amenable number.

30136813 is a deficient number, since it is larger than the sum of its proper divisors (5026259).

30136813 is a wasteful number, since it uses less digits than its factorization.

30136813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872 (or 1865 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30136813 is about 5489.7006293604. The cubic root of 30136813 is about 311.1948786008.

Adding to 30136813 its reverse (31863103), we get a palindrome (61999916).

The spelling of 30136813 in words is "thirty million, one hundred thirty-six thousand, eight hundred thirteen".