21826706155 has 16 divisors (see below), whose sum is σ = 26747671968. Its totient is φ = 17093664000.

The previous prime is 21826706119. The next prime is 21826706179. The reversal of 21826706155 is 55160762812.

It is not a de Polignac number, because 21826706155 - 2²⁹ = 21289835243 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 105226 + ... + 233935.

It is an arithmetic number, because the mean of its divisors is an integer number (1671729498).

Almost surely, 2^21826706155 is an apocalyptic number.

21826706155 is a deficient number, since it is larger than the sum of its proper divisors (4920965813).

21826706155 is a wasteful number, since it uses less digits than its factorization.

21826706155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339438.

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 21826706155 in words is "twenty-one billion, eight hundred twenty-six million, seven hundred six thousand, one hundred fifty-five".