30894189503521 has 4 divisors (see below), whose sum is σ = 32711494768452. Its totient is φ = 29076884238592.

The previous prime is 30894189503497. The next prime is 30894189503581. The reversal of 30894189503521 is 12530598149803.

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 28262397105121 + 2631792398400 = 5316239^2 + 1622280^2 .

It is a cyclic number.

It is not a de Polignac number, because 30894189503521 - 2¹¹ = 30894189501473 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30894189503581) 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, 908652632440 + ... + 908652632473.

It is an arithmetic number, because the mean of its divisors is an integer number (8177873692113).

Almost surely, 2^{30894189503521} is an apocalyptic number.

It is an amenable number.

30894189503521 is a deficient number, since it is larger than the sum of its proper divisors (1817305264931).

30894189503521 is a wasteful number, since it uses less digits than its factorization.

30894189503521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817305264930.

The product of its (nonzero) digits is 9331200, while the sum is 58.

The spelling of 30894189503521 in words is "thirty trillion, eight hundred ninety-four billion, one hundred eighty-nine million, five hundred three thousand, five hundred twenty-one".