12408732394 has 4 divisors (see below), whose sum is σ = 18613098594. Its totient is φ = 6204366196.

The previous prime is 12408732373. The next prime is 12408732397. The reversal of 12408732394 is 49323780421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49323780421 = 31 ⋅1591089691.

It can be written as a sum of positive squares in only one way, i.e., 7719906769 + 4688825625 = 87863^2 + 68475^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12408732394.

It is not an unprimeable number, because it can be changed into a prime (12408732397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3102183097 + ... + 3102183100.

Almost surely, 2^12408732394 is an apocalyptic number.

12408732394 is a deficient number, since it is larger than the sum of its proper divisors (6204366200).

12408732394 is an equidigital number, since it uses as much as digits as its factorization.

12408732394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6204366199.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 12408732394 in words is "twelve billion, four hundred eight million, seven hundred thirty-two thousand, three hundred ninety-four".