21337216606704 has 160 divisors (see below), whose sum is σ = 56411288446464. Its totient is φ = 6948101099520.

The previous prime is 21337216606703. The next prime is 21337216606729. The reversal of 21337216606704 is 40760661273312.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21337216606703) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164367327 + ... + 164497089.

Almost surely, 2^{21337216606704} is an apocalyptic number.

21337216606704 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 21337216606704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28205644223232).

21337216606704 is an abundant number, since it is smaller than the sum of its proper divisors (35074071839760).

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

21337216606704 is a wasteful number, since it uses less digits than its factorization.

21337216606704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130295 (or 130289 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 48.

The spelling of 21337216606704 in words is "twenty-one trillion, three hundred thirty-seven billion, two hundred sixteen million, six hundred six thousand, seven hundred four".