21695750080 has 56 divisors (see below), whose sum is σ = 51961767552. Its totient is φ = 8628114432.

The previous prime is 21695750071. The next prime is 21695750099. The reversal of 21695750080 is 8005759612.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140592 + ... + 251311.

Almost surely, 2^21695750080 is an apocalyptic number.

21695750080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21695750080 is an abundant number, since it is smaller than the sum of its proper divisors (30266017472).

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

21695750080 is a wasteful number, since it uses less digits than its factorization.

21695750080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392093 (or 392083 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 21695750080 in words is "twenty-one billion, six hundred ninety-five million, seven hundred fifty thousand, eighty".