30532478381 has 4 divisors (see below), whose sum is σ = 30563539872. Its totient is φ = 30501416892.

The previous prime is 30532478377. The next prime is 30532478401. The reversal of 30532478381 is 18387423503.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18387423503 = 191 ⋅96269233.

It is a cyclic number.

It is not a de Polignac number, because 30532478381 - 2² = 30532478377 is a prime.

It is a super-2 number, since 2×30532478381² (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 (30532478281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15529271 + ... + 15531236.

It is an arithmetic number, because the mean of its divisors is an integer number (7640884968).

Almost surely, 2^30532478381 is an apocalyptic number.

It is an amenable number.

30532478381 is a deficient number, since it is larger than the sum of its proper divisors (31061491).

30532478381 is an equidigital number, since it uses as much as digits as its factorization.

30532478381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31061490.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 30532478381 in words is "thirty billion, five hundred thirty-two million, four hundred seventy-eight thousand, three hundred eighty-one".