13921212436 has 6 divisors (see below), whose sum is σ = 24362121770. Its totient is φ = 6960606216.

The previous prime is 13921212367. The next prime is 13921212443. The reversal of 13921212436 is 63421212931.

It can be written as a sum of positive squares in only one way, i.e., 13872128400 + 49084036 = 117780^2 + 7006^2 .

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, 1740151551 + ... + 1740151558.

Almost surely, 2^13921212436 is an apocalyptic number.

It is an amenable number.

13921212436 is a deficient number, since it is larger than the sum of its proper divisors (10440909334).

13921212436 is a wasteful number, since it uses less digits than its factorization.

13921212436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3480303113 (or 3480303111 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The spelling of 13921212436 in words is "thirteen billion, nine hundred twenty-one million, two hundred twelve thousand, four hundred thirty-six".