21552346436 has 12 divisors (see below), whose sum is σ = 37735488000. Its totient is φ = 10770778440.

The previous prime is 21552346433. The next prime is 21552346447. The reversal of 21552346436 is 63464325512.

It is a junction number, because it is equal to n+sod(n) for n = 21552346393 and 21552346402.

It is not an unprimeable number, because it can be changed into a prime (21552346433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1339700 + ... + 1355691.

It is an arithmetic number, because the mean of its divisors is an integer number (3144624000).

Almost surely, 2^21552346436 is an apocalyptic number.

It is an amenable number.

21552346436 is a deficient number, since it is larger than the sum of its proper divisors (16183141564).

21552346436 is a wasteful number, since it uses less digits than its factorization.

21552346436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697394 (or 2697392 counting only the distinct ones).

The product of its digits is 518400, while the sum is 41.

The spelling of 21552346436 in words is "twenty-one billion, five hundred fifty-two million, three hundred forty-six thousand, four hundred thirty-six".