21941169 has 12 divisors (see below), whose sum is σ = 31078224. Its totient is φ = 13766464.

The previous prime is 21941159. The next prime is 21941189. The reversal of 21941169 is 96114912.

It is not a de Polignac number, because 21941169 - 2⁷ = 21941041 is a prime.

It is a super-2 number, since 2×21941169² = 962829794173122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21941119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11787 + ... + 13520.

It is an arithmetic number, because the mean of its divisors is an integer number (2589852).

Almost surely, 2^21941169 is an apocalyptic number.

It is an amenable number.

21941169 is a deficient number, since it is larger than the sum of its proper divisors (9137055).

21941169 is a wasteful number, since it uses less digits than its factorization.

21941169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25344 (or 25327 counting only the distinct ones).

The product of its digits is 3888, while the sum is 33.

The square root of 21941169 is about 4684.1401558877. The cubic root of 21941169 is about 279.9539422542.

The spelling of 21941169 in words is "twenty-one million, nine hundred forty-one thousand, one hundred sixty-nine".