21333787080 has 384 divisors, whose sum is σ = 71171896320. Its totient is φ = 5106309120.

The previous prime is 21333787063. The next prime is 21333787109. The reversal of 21333787080 is 8078733312.

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 95 ways as a sum of consecutive naturals, for example, 72811414 + ... + 72811706.

It is an arithmetic number, because the mean of its divisors is an integer number (185343480).

Almost surely, 2^21333787080 is an apocalyptic number.

21333787080 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 21333787080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35585948160).

21333787080 is an abundant number, since it is smaller than the sum of its proper divisors (49838109240).

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

21333787080 is a wasteful number, since it uses less digits than its factorization.

21333787080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The spelling of 21333787080 in words is "twenty-one billion, three hundred thirty-three million, seven hundred eighty-seven thousand, eighty".