30156693893 has 4 divisors (see below), whose sum is σ = 30157142988. Its totient is φ = 30156244800.

The previous prime is 30156693883. The next prime is 30156693901. The reversal of 30156693893 is 39839665103.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12016105924 + 18140587969 = 109618^2 + 134687^2 .

It is a cyclic number.

It is not a de Polignac number, because 30156693893 - 2⁴ = 30156693877 is a prime.

It is a super-2 number, since 2×30156693893² (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 (30156693803) 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, 101258 + ... + 265643.

It is an arithmetic number, because the mean of its divisors is an integer number (7539285747).

Almost surely, 2^30156693893 is an apocalyptic number.

It is an amenable number.

30156693893 is a deficient number, since it is larger than the sum of its proper divisors (449095).

30156693893 is an equidigital number, since it uses as much as digits as its factorization.

30156693893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449094.

The product of its (nonzero) digits is 3149280, while the sum is 53.

The spelling of 30156693893 in words is "thirty billion, one hundred fifty-six million, six hundred ninety-three thousand, eight hundred ninety-three".