21337071144 has 96 divisors (see below), whose sum is σ = 57735205920. Its totient is φ = 6567568384.

The previous prime is 21337071143. The next prime is 21337071149. The reversal of 21337071144 is 44117073312.

It is not an unprimeable number, because it can be changed into a prime (21337071143) 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, 338587 + ... + 396629.

It is an arithmetic number, because the mean of its divisors is an integer number (601408395).

Almost surely, 2^21337071144 is an apocalyptic number.

21337071144 is a gapful number since it is divisible by the number (24) 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 21337071144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28867602960).

21337071144 is an abundant number, since it is smaller than the sum of its proper divisors (36398134776).

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

21337071144 is a wasteful number, since it uses less digits than its factorization.

21337071144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58139 (or 58118 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The spelling of 21337071144 in words is "twenty-one billion, three hundred thirty-seven million, seventy-one thousand, one hundred forty-four".