30798018693 has 90 divisors (see below), whose sum is σ = 52090566066. Its totient is φ = 18124337088.

The previous prime is 30798018679. The next prime is 30798018701. The reversal of 30798018693 is 39681089703.

It can be written as a sum of positive squares in 3 ways, for example, as 1563174369 + 29234844324 = 39537^2 + 170982^2 .

It is not a de Polignac number, because 30798018693 - 2¹³ = 30798010501 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 (30798010693) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 7239355 + ... + 7243607.

Almost surely, 2^30798018693 is an apocalyptic number.

It is an amenable number.

30798018693 is a deficient number, since it is larger than the sum of its proper divisors (21292547373).

30798018693 is a wasteful number, since it uses less digits than its factorization.

30798018693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4337 (or 4292 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 30798018693 in words is "thirty billion, seven hundred ninety-eight million, eighteen thousand, six hundred ninety-three".