21445664524284 has 192 divisors, whose sum is σ = 70107567022080. Its totient is φ = 4918260314880.

The previous prime is 21445664524267. The next prime is 21445664524363. The reversal of 21445664524284 is 48242546654412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38535754 + ... + 39088305.

It is an arithmetic number, because the mean of its divisors is an integer number (365143578240).

Almost surely, 2^{21445664524284} is an apocalyptic number.

It is an amenable number.

21445664524284 is an abundant number, since it is smaller than the sum of its proper divisors (48661902497796).

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

21445664524284 is a wasteful number, since it uses less digits than its factorization.

21445664524284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77624120 (or 77624118 counting only the distinct ones).

The product of its digits is 58982400, while the sum is 57.

The spelling of 21445664524284 in words is "twenty-one trillion, four hundred forty-five billion, six hundred sixty-four million, five hundred twenty-four thousand, two hundred eighty-four".