30553747993 has 4 divisors (see below), whose sum is σ = 31607325540. Its totient is φ = 29500170448.

The previous prime is 30553747949. The next prime is 30553748033. The reversal of 30553747993 is 39974735503.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39974735503 = 601 ⋅66513703.

It can be written as a sum of positive squares in 2 ways, for example, as 21940423129 + 8613324864 = 148123^2 + 92808^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30553747993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30553745993) 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, 526788730 + ... + 526788787.

It is an arithmetic number, because the mean of its divisors is an integer number (7901831385).

Almost surely, 2^30553747993 is an apocalyptic number.

It is an amenable number.

30553747993 is a deficient number, since it is larger than the sum of its proper divisors (1053577547).

30553747993 is a wasteful number, since it uses less digits than its factorization.

30553747993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053577546.

The product of its (nonzero) digits is 10716300, while the sum is 55.

The spelling of 30553747993 in words is "thirty billion, five hundred fifty-three million, seven hundred forty-seven thousand, nine hundred ninety-three".