13533021644 has 12 divisors (see below), whose sum is σ = 23683795800. Its totient is φ = 6766222848.

The previous prime is 13533021637. The next prime is 13533021673. The reversal of 13533021644 is 44612033531.

It is a self number, because there is not a number n which added to its sum of digits gives 13533021644.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61067 + ... + 175485.

It is an arithmetic number, because the mean of its divisors is an integer number (1973649650).

Almost surely, 2^13533021644 is an apocalyptic number.

It is an amenable number.

13533021644 is a deficient number, since it is larger than the sum of its proper divisors (10150774156).

13533021644 is a wasteful number, since it uses less digits than its factorization.

13533021644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143992 (or 143990 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 13533021644 in words is "thirteen billion, five hundred thirty-three million, twenty-one thousand, six hundred forty-four".