30206813 has 8 divisors (see below), whose sum is σ = 37177728. Its totient is φ = 23899824.

The previous prime is 30206809. The next prime is 30206831. The reversal of 30206813 is 31860203.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30206813 - 2² = 30206809 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30206863) 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, 165881 + ... + 166062.

It is an arithmetic number, because the mean of its divisors is an integer number (4647216).

Almost surely, 2^30206813 is an apocalyptic number.

It is an amenable number.

30206813 is a deficient number, since it is larger than the sum of its proper divisors (6970915).

30206813 is a wasteful number, since it uses less digits than its factorization.

30206813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331963.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30206813 is about 5496.0725067997. The cubic root of 30206813 is about 311.4356339555.

The spelling of 30206813 in words is "thirty million, two hundred six thousand, eight hundred thirteen".