21472120116 has 96 divisors (see below), whose sum is σ = 57509760000. Its totient is φ = 6921002880.

The previous prime is 21472120081. The next prime is 21472120123. The reversal of 21472120116 is 61102127412.

It is a super-2 number, since 2×21472120116² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 21472120116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7809510 + ... + 7812258.

It is an arithmetic number, because the mean of its divisors is an integer number (599060000).

Almost surely, 2^21472120116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21472120116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28754880000).

21472120116 is an abundant number, since it is smaller than the sum of its proper divisors (36037639884).

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

21472120116 is a wasteful number, since it uses less digits than its factorization.

21472120116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5126 (or 5118 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

Adding to 21472120116 its reverse (61102127412), we get a palindrome (82574247528).

The spelling of 21472120116 in words is "twenty-one billion, four hundred seventy-two million, one hundred twenty thousand, one hundred sixteen".