21012833184 has 96 divisors (see below), whose sum is σ = 63066157056. Its totient is φ = 6001032960.

The previous prime is 21012833183. The next prime is 21012833197. The reversal of 21012833184 is 48133821012.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-4 number, since 4×21012833184⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21012833183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1934649 + ... + 1945479.

It is an arithmetic number, because the mean of its divisors is an integer number (656939136).

Almost surely, 2^21012833184 is an apocalyptic number.

21012833184 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21012833184 is an abundant number, since it is smaller than the sum of its proper divisors (42053323872).

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

21012833184 is a wasteful number, since it uses less digits than its factorization.

21012833184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13738 (or 13730 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 21012833184 in words is "twenty-one billion, twelve million, eight hundred thirty-three thousand, one hundred eighty-four".