20755149 has 4 divisors (see below), whose sum is σ = 27673536. Its totient is φ = 13836764.

The previous prime is 20755139. The next prime is 20755157. The reversal of 20755149 is 94155702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20755149 - 2¹¹ = 20753101 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20755109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3459189 + ... + 3459194.

It is an arithmetic number, because the mean of its divisors is an integer number (6918384).

Almost surely, 2^20755149 is an apocalyptic number.

It is an amenable number.

20755149 is a deficient number, since it is larger than the sum of its proper divisors (6918387).

20755149 is an equidigital number, since it uses as much as digits as its factorization.

20755149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6918386.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 20755149 is about 4555.7819306898. The cubic root of 20755149 is about 274.8159606086.

The spelling of 20755149 in words is "twenty million, seven hundred fifty-five thousand, one hundred forty-nine".