21194055 has 40 divisors (see below), whose sum is σ = 38907792. Its totient is φ = 11031552.

The previous prime is 21194029. The next prime is 21194077. The reversal of 21194055 is 55049112.

It is not a de Polignac number, because 21194055 - 2⁷ = 21193927 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16807 + ... + 18023.

Almost surely, 2^21194055 is an apocalyptic number.

21194055 is a deficient number, since it is larger than the sum of its proper divisors (17713737).

21194055 is a wasteful number, since it uses less digits than its factorization.

21194055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277 (or 1268 counting only the distinct ones).

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

The square root of 21194055 is about 4603.7001422769. The cubic root of 21194055 is about 276.7396276986.

The spelling of 21194055 in words is "twenty-one million, one hundred ninety-four thousand, fifty-five".