21464229888 has 144 divisors (see below), whose sum is σ = 62297726400. Its totient is φ = 7119544320.

The previous prime is 21464229883. The next prime is 21464229959. The reversal of 21464229888 is 88892246412.

21464229888 is a `hidden beast` number, since 214 + 64 + 2 + 298 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21464229883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3886393 + ... + 3891911.

It is an arithmetic number, because the mean of its divisors is an integer number (432623100).

Almost surely, 2^21464229888 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 21464229888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31148863200).

21464229888 is an abundant number, since it is smaller than the sum of its proper divisors (40833496512).

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

21464229888 is a wasteful number, since it uses less digits than its factorization.

21464229888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5758 (or 5735 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 54.

The spelling of 21464229888 in words is "twenty-one billion, four hundred sixty-four million, two hundred twenty-nine thousand, eight hundred eighty-eight".