20132749 has 8 divisors (see below), whose sum is σ = 24778880. Its totient is φ = 15929136.

The previous prime is 20132713. The next prime is 20132803. The reversal of 20132749 is 94723102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20132749 - 2²¹ = 18035597 is a prime.

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 (20132149) 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 7 ways as a sum of consecutive naturals, for example, 110529 + ... + 110710.

It is an arithmetic number, because the mean of its divisors is an integer number (3097360).

Almost surely, 2^20132749 is an apocalyptic number.

It is an amenable number.

20132749 is a deficient number, since it is larger than the sum of its proper divisors (4646131).

20132749 is a wasteful number, since it uses less digits than its factorization.

20132749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221259.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 20132749 is about 4486.9531978838. The cubic root of 20132749 is about 272.0409981814.

The spelling of 20132749 in words is "twenty million, one hundred thirty-two thousand, seven hundred forty-nine".