20760749 has 12 divisors (see below), whose sum is σ = 22128480. Its totient is φ = 19473480.

The previous prime is 20760721. The next prime is 20760767. The reversal of 20760749 is 94706702.

It is a de Polignac number, because none of the positive numbers 2^k-20760749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20760709) 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, 47072 + ... + 47510.

It is an arithmetic number, because the mean of its divisors is an integer number (1844040).

Almost surely, 2^20760749 is an apocalyptic number.

It is an amenable number.

20760749 is a deficient number, since it is larger than the sum of its proper divisors (1367731).

20760749 is a wasteful number, since it uses less digits than its factorization.

20760749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 20760749 is about 4556.3964928439. The cubic root of 20760749 is about 274.8406746525.

The spelling of 20760749 in words is "twenty million, seven hundred sixty thousand, seven hundred forty-nine".