21955041 has 36 divisors (see below), whose sum is σ = 35248512. Its totient is φ = 13140864.

The previous prime is 21955039. The next prime is 21955067. The reversal of 21955041 is 14055912.

It is not a de Polignac number, because 21955041 - 2¹ = 21955039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21954996 and 21955014.

It is not an unprimeable number, because it can be changed into a prime (21955441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 59640 + ... + 60006.

Almost surely, 2^21955041 is an apocalyptic number.

It is an amenable number.

21955041 is a deficient number, since it is larger than the sum of its proper divisors (13293471).

21955041 is a wasteful number, since it uses less digits than its factorization.

21955041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 21955041 is about 4685.6206632633. The cubic root of 21955041 is about 280.0129288248.

The spelling of 21955041 in words is "twenty-one million, nine hundred fifty-five thousand, forty-one".