193481732906 has 72 divisors (see below), whose sum is σ = 373034688768. Its totient is φ = 74986942800.

The previous prime is 193481732891. The next prime is 193481732909. The reversal of 193481732906 is 609237184391.

It is not an unprimeable number, because it can be changed into a prime (193481732909) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2222165 + ... + 2307591.

It is an arithmetic number, because the mean of its divisors is an integer number (5181037344).

Almost surely, 2^193481732906 is an apocalyptic number.

193481732906 is a deficient number, since it is larger than the sum of its proper divisors (179552955862).

193481732906 is a wasteful number, since it uses less digits than its factorization.

193481732906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85656 (or 85638 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 193481732906 in words is "one hundred ninety-three billion, four hundred eighty-one million, seven hundred thirty-two thousand, nine hundred six".