21334455120 has 160 divisors (see below), whose sum is σ = 72398116224. Its totient is φ = 5154150400.

The previous prime is 21334455097. The next prime is 21334455137. The reversal of 21334455120 is 2155443312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 759730 + ... + 787310.

Almost surely, 2^21334455120 is an apocalyptic number.

21334455120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21334455120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36199058112).

21334455120 is an abundant number, since it is smaller than the sum of its proper divisors (51063661104).

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

21334455120 is a wasteful number, since it uses less digits than its factorization.

21334455120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27901 (or 27895 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 21334455120 its reverse (2155443312), we get a palindrome (23489898432).

The spelling of 21334455120 in words is "twenty-one billion, three hundred thirty-four million, four hundred fifty-five thousand, one hundred twenty".