21903033216 has 64 divisors (see below), whose sum is σ = 60709518720. Its totient is φ = 6983572992.

The previous prime is 21903033211. The next prime is 21903033241. The reversal of 21903033216 is 61233030912.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×21903033216² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21903033211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1231150 + ... + 1248813.

It is an arithmetic number, because the mean of its divisors is an integer number (948586230).

Almost surely, 2^21903033216 is an apocalyptic number.

It is an amenable number.

21903033216 is an abundant number, since it is smaller than the sum of its proper divisors (38806485504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21903033216 is a wasteful number, since it uses less digits than its factorization.

21903033216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480003 (or 2479991 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 30.

The spelling of 21903033216 in words is "twenty-one billion, nine hundred three million, thirty-three thousand, two hundred sixteen".