30840061823 has 4 divisors (see below), whose sum is σ = 31122998280. Its totient is φ = 30557125368.

The previous prime is 30840061799. The next prime is 30840061829. The reversal of 30840061823 is 32816004803.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30840061823 is a prime.

It is a super-2 number, since 2×30840061823² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30840061829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141468065 + ... + 141468282.

It is an arithmetic number, because the mean of its divisors is an integer number (7780749570).

Almost surely, 2^30840061823 is an apocalyptic number.

30840061823 is a deficient number, since it is larger than the sum of its proper divisors (282936457).

30840061823 is a wasteful number, since it uses less digits than its factorization.

30840061823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282936456.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 30840061823 in words is "thirty billion, eight hundred forty million, sixty-one thousand, eight hundred twenty-three".