20403400432 has 10 divisors (see below), whose sum is σ = 39531588368. Its totient is φ = 10201700208.

The previous prime is 20403400411. The next prime is 20403400481. The reversal of 20403400432 is 23400430402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637606248 + ... + 637606279.

Almost surely, 2^20403400432 is an apocalyptic number.

It is an amenable number.

20403400432 is a deficient number, since it is larger than the sum of its proper divisors (19128187936).

20403400432 is a wasteful number, since it uses less digits than its factorization.

20403400432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275212535 (or 1275212529 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20403400432 its reverse (23400430402), we get a palindrome (43803830834).

The spelling of 20403400432 in words is "twenty billion, four hundred three million, four hundred thousand, four hundred thirty-two".