21484206432 has 144 divisors (see below), whose sum is σ = 66411530640. Its totient is φ = 6548622336.

The previous prime is 21484206431. The next prime is 21484206437. The reversal of 21484206432 is 23460248412.

21484206432 is a `hidden beast` number, since 2 + 1 + 4 + 8 + 4 + 2 + 0 + 643 + 2 = 666.

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

It is a super-2 number, since 2×21484206432² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21484206431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 373794 + ... + 427422.

It is an arithmetic number, because the mean of its divisors is an integer number (461191185).

Almost surely, 2^21484206432 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 21484206432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33205765320).

21484206432 is an abundant number, since it is smaller than the sum of its proper divisors (44927324208).

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

21484206432 is a wasteful number, since it uses less digits than its factorization.

21484206432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53765 (or 53754 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 36.

The spelling of 21484206432 in words is "twenty-one billion, four hundred eighty-four million, two hundred six thousand, four hundred thirty-two".