21772301305 has 16 divisors (see below), whose sum is σ = 27616953600. Its totient is φ = 16432053120.

The previous prime is 21772301303. The next prime is 21772301323. The reversal of 21772301305 is 50310327712.

It is not a de Polignac number, because 21772301305 - 2¹ = 21772301303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21772301303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456756 + ... + 502165.

It is an arithmetic number, because the mean of its divisors is an integer number (1726059600).

Almost surely, 2^21772301305 is an apocalyptic number.

It is an amenable number.

21772301305 is a deficient number, since it is larger than the sum of its proper divisors (5844652295).

21772301305 is a wasteful number, since it uses less digits than its factorization.

21772301305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959184.

The product of its (nonzero) digits is 8820, while the sum is 31.

The spelling of 21772301305 in words is "twenty-one billion, seven hundred seventy-two million, three hundred one thousand, three hundred five".