20211626220169 has 16 divisors (see below), whose sum is σ = 20315329266960. Its totient is φ = 20108221056000.

The previous prime is 20211626220167. The next prime is 20211626220211. The reversal of 20211626220169 is 96102262611202.

It can be written as a sum of positive squares in 8 ways, for example, as 2722460400144 + 17489165820025 = 1649988^2 + 4182005^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211626220169 - 2¹ = 20211626220167 is a prime.

It is a super-2 number, since 2×20211626220169² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211626220167) 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, 524944419 + ... + 524982919.

It is an arithmetic number, because the mean of its divisors is an integer number (1269708079185).

Almost surely, 2^{20211626220169} is an apocalyptic number.

It is an amenable number.

20211626220169 is a deficient number, since it is larger than the sum of its proper divisors (103703046791).

20211626220169 is a wasteful number, since it uses less digits than its factorization.

20211626220169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42300.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 20211626220169 in words is "twenty trillion, two hundred eleven billion, six hundred twenty-six million, two hundred twenty thousand, one hundred sixty-nine".