21241617084 has 36 divisors (see below), whose sum is σ = 54707188536. Its totient is φ = 6946943328.

The previous prime is 21241616987. The next prime is 21241617127. The reversal of 21241617084 is 48071614212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5564554 + ... + 5568369.

It is an arithmetic number, because the mean of its divisors is an integer number (1519644126).

Almost surely, 2^21241617084 is an apocalyptic number.

It is an amenable number.

21241617084 is an abundant number, since it is smaller than the sum of its proper divisors (33465571452).

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

21241617084 is a wasteful number, since it uses less digits than its factorization.

21241617084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11132986 (or 11132981 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 21241617084 in words is "twenty-one billion, two hundred forty-one million, six hundred seventeen thousand, eighty-four".