20404312132 has 6 divisors (see below), whose sum is σ = 35707546238. Its totient is φ = 10202156064.

The previous prime is 20404312129. The next prime is 20404312151. The reversal of 20404312132 is 23121340402.

It can be written as a sum of positive squares in only one way, i.e., 14140539396 + 6263772736 = 118914^2 + 79144^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2550539013 + ... + 2550539020.

Almost surely, 2^20404312132 is an apocalyptic number.

It is an amenable number.

20404312132 is a deficient number, since it is larger than the sum of its proper divisors (15303234106).

20404312132 is a wasteful number, since it uses less digits than its factorization.

20404312132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101078037 (or 5101078035 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20404312132 its reverse (23121340402), we get a palindrome (43525652534).

The spelling of 20404312132 in words is "twenty billion, four hundred four million, three hundred twelve thousand, one hundred thirty-two".