21755546722 has 16 divisors (see below), whose sum is σ = 40164086592. Its totient is φ = 8606589840.

The previous prime is 21755546719. The next prime is 21755546723. The reversal of 21755546722 is 22764555712.

It is not an unprimeable number, because it can be changed into a prime (21755546723) 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, 59767804 + ... + 59768167.

It is an arithmetic number, because the mean of its divisors is an integer number (2510255412).

Almost surely, 2^21755546722 is an apocalyptic number.

21755546722 is a deficient number, since it is larger than the sum of its proper divisors (18408539870).

21755546722 is a wasteful number, since it uses less digits than its factorization.

21755546722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119535993.

The product of its digits is 1176000, while the sum is 46.

The spelling of 21755546722 in words is "twenty-one billion, seven hundred fifty-five million, five hundred forty-six thousand, seven hundred twenty-two".