21144545334 has 96 divisors (see below), whose sum is σ = 52668465408. Its totient is φ = 6068040000.

The previous prime is 21144545327. The next prime is 21144545353. The reversal of 21144545334 is 43354544112.

21144545334 is a `hidden beast` number, since 2 + 114 + 4 + 5 + 4 + 533 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 436969 + ... + 482939.

It is an arithmetic number, because the mean of its divisors is an integer number (548629848).

Almost surely, 2^21144545334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21144545334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26334232704).

21144545334 is an abundant number, since it is smaller than the sum of its proper divisors (31523920074).

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

21144545334 is a wasteful number, since it uses less digits than its factorization.

21144545334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46114 (or 46111 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The spelling of 21144545334 in words is "twenty-one billion, one hundred forty-four million, five hundred forty-five thousand, three hundred thirty-four".