21727015256226 has 64 divisors (see below), whose sum is σ = 49952258178048. Its totient is φ = 6171409973568.

The previous prime is 21727015256197. The next prime is 21727015256237. The reversal of 21727015256226 is 62265251072712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113857345 + ... + 114048011.

It is an arithmetic number, because the mean of its divisors is an integer number (780504034032).

Almost surely, 2^{21727015256226} is an apocalyptic number.

21727015256226 is an abundant number, since it is smaller than the sum of its proper divisors (28225242921822).

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

21727015256226 is a wasteful number, since it uses less digits than its factorization.

21727015256226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206535.

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 21727015256226 in words is "twenty-one trillion, seven hundred twenty-seven billion, fifteen million, two hundred fifty-six thousand, two hundred twenty-six".