21067319700 has 1296 divisors, whose sum is σ = 91134792000. Its totient is φ = 4145541120.

The previous prime is 21067319653. The next prime is 21067319701. The reversal of 21067319700 is 791376012.

It is a happy number.

21067319700 is a `hidden beast` number, since 210 + 67 + 319 + 70 + 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 not an unprimeable number, because it can be changed into a prime (21067319701) by changing a digit.

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 431 ways as a sum of consecutive naturals, for example, 726459286 + ... + 726459314.

Almost surely, 2^21067319700 is an apocalyptic number.

21067319700 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 21067319700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45567396000).

21067319700 is an abundant number, since it is smaller than the sum of its proper divisors (70067472300).

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

21067319700 is a wasteful number, since it uses less digits than its factorization.

21067319700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The spelling of 21067319700 in words is "twenty-one billion, sixty-seven million, three hundred nineteen thousand, seven hundred".