30684381253 has 4 divisors (see below), whose sum is σ = 30685061088. Its totient is φ = 30683701420.

The previous prime is 30684381179. The next prime is 30684381293. The reversal of 30684381253 is 35218348603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30684381253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30684381293) 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, 267001 + ... + 364222.

It is an arithmetic number, because the mean of its divisors is an integer number (7671265272).

Almost surely, 2^30684381253 is an apocalyptic number.

It is an amenable number.

30684381253 is a deficient number, since it is larger than the sum of its proper divisors (679835).

30684381253 is an equidigital number, since it uses as much as digits as its factorization.

30684381253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679834.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 30684381253 in words is "thirty billion, six hundred eighty-four million, three hundred eighty-one thousand, two hundred fifty-three".