21000526704 has 120 divisors (see below), whose sum is σ = 59692908080. Its totient is φ = 6890904576.

The previous prime is 21000526693. The next prime is 21000526741. The reversal of 21000526704 is 40762500012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6442227 + ... + 6445485.

Almost surely, 2^21000526704 is an apocalyptic number.

21000526704 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 21000526704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29846454040).

21000526704 is an abundant number, since it is smaller than the sum of its proper divisors (38692381376).

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

21000526704 is a wasteful number, since it uses less digits than its factorization.

21000526704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3959 (or 3950 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The spelling of 21000526704 in words is "twenty-one billion, five hundred twenty-six thousand, seven hundred four".