21026926080 has 560 divisors, whose sum is σ = 79700947920. Its totient is φ = 5303107584.

The previous prime is 21026926073. The next prime is 21026926091. The reversal of 21026926080 is 8062962012.

It is a happy number.

21026926080 is a `hidden beast` number, since 21 + 0 + 26 + 9 + 2 + 608 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 35458264 + ... + 35458856.

Almost surely, 2^21026926080 is an apocalyptic number.

21026926080 is a gapful number since it is divisible by the number (20) 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 21026926080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39850473960).

21026926080 is an abundant number, since it is smaller than the sum of its proper divisors (58674021840).

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

21026926080 is an frugal number, since it uses more digits than its factorization.

21026926080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 21026926080 in words is "twenty-one billion, twenty-six million, nine hundred twenty-six thousand, eighty".