21550705067 has 8 divisors (see below), whose sum is σ = 22167904080. Its totient is φ = 20942019360.

The previous prime is 21550705031. The next prime is 21550705079. The reversal of 21550705067 is 76050705512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21550705067 - 2⁶ = 21550705003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21550705067.

It is not an unprimeable number, because it can be changed into a prime (21550705097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2123192 + ... + 2133317.

It is an arithmetic number, because the mean of its divisors is an integer number (2770988010).

Almost surely, 2^21550705067 is an apocalyptic number.

21550705067 is a deficient number, since it is larger than the sum of its proper divisors (617199013).

21550705067 is an equidigital number, since it uses as much as digits as its factorization.

21550705067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256653.

The product of its (nonzero) digits is 73500, while the sum is 38.

The spelling of 21550705067 in words is "twenty-one billion, five hundred fifty million, seven hundred five thousand, sixty-seven".