20133549 has 16 divisors (see below), whose sum is σ = 30096000. Its totient is φ = 13301568.

The previous prime is 20133527. The next prime is 20133551. The reversal of 20133549 is 94533102.

It is not a de Polignac number, because 20133549 - 2⁵ = 20133517 is a prime.

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

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249 + ... + 6350.

It is an arithmetic number, because the mean of its divisors is an integer number (1881000).

Almost surely, 2^20133549 is an apocalyptic number.

It is an amenable number.

20133549 is a deficient number, since it is larger than the sum of its proper divisors (9962451).

20133549 is a wasteful number, since it uses less digits than its factorization.

20133549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6721 (or 6715 counting only the distinct ones).

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

The square root of 20133549 is about 4487.0423443511. The cubic root of 20133549 is about 272.0446014303.

The spelling of 20133549 in words is "twenty million, one hundred thirty-three thousand, five hundred forty-nine".