21227064958 has 16 divisors (see below), whose sum is σ = 35323931520. Its totient is φ = 9485128600.

The previous prime is 21227064923. The next prime is 21227064959. The reversal of 21227064958 is 85946072212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21227064959) 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, 8175538 + ... + 8178133.

It is an arithmetic number, because the mean of its divisors is an integer number (2207745720).

Almost surely, 2^21227064958 is an apocalyptic number.

21227064958 is a deficient number, since it is larger than the sum of its proper divisors (14096866562).

21227064958 is a wasteful number, since it uses less digits than its factorization.

21227064958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16353743.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 21227064958 in words is "twenty-one billion, two hundred twenty-seven million, sixty-four thousand, nine hundred fifty-eight".