20452749 has 8 divisors (see below), whose sum is σ = 28007520. Its totient is φ = 13266576.

The previous prime is 20452739. The next prime is 20452769. The reversal of 20452749 is 94725402.

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

It is not a de Polignac number, because 20452749 - 2¹¹ = 20450701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20452739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92019 + ... + 92240.

It is an arithmetic number, because the mean of its divisors is an integer number (3500940).

Almost surely, 2^20452749 is an apocalyptic number.

It is an amenable number.

20452749 is a deficient number, since it is larger than the sum of its proper divisors (7554771).

20452749 is a wasteful number, since it uses less digits than its factorization.

20452749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184299.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20452749 is about 4522.4715587829. The cubic root of 20452749 is about 273.4747472025.

The spelling of 20452749 in words is "twenty million, four hundred fifty-two thousand, seven hundred forty-nine".