21746569068 has 384 divisors, whose sum is σ = 70318080000. Its totient is φ = 5796645120.

The previous prime is 21746569051. The next prime is 21746569079. The reversal of 21746569068 is 86096564712.

21746569068 is a `hidden beast` number, since 2 + 1 + 74 + 6 + 569 + 0 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 33302230 + ... + 33302882.

It is an arithmetic number, because the mean of its divisors is an integer number (183120000).

Almost surely, 2^21746569068 is an apocalyptic number.

21746569068 is a gapful number since it is divisible by the number (28) 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 21746569068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35159040000).

21746569068 is an abundant number, since it is smaller than the sum of its proper divisors (48571510932).

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

21746569068 is a wasteful number, since it uses less digits than its factorization.

21746569068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 21746569068 in words is "twenty-one billion, seven hundred forty-six million, five hundred sixty-nine thousand, sixty-eight".