20393541 has 12 divisors (see below), whose sum is σ = 33665632. Its totient is φ = 11653416.

The previous prime is 20393521. The next prime is 20393579. The reversal of 20393541 is 14539302.

It is not a de Polignac number, because 20393541 - 2⁵ = 20393509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20393521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161791 + ... + 161916.

Almost surely, 2^20393541 is an apocalyptic number.

20393541 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20393541 is a deficient number, since it is larger than the sum of its proper divisors (13272091).

20393541 is a wasteful number, since it uses less digits than its factorization.

20393541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323720 (or 323717 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 20393541 is about 4515.9208363301. The cubic root of 20393541 is about 273.2106010891.

The spelling of 20393541 in words is "twenty million, three hundred ninety-three thousand, five hundred forty-one".