20757073 has 8 divisors (see below), whose sum is σ = 21505536. Its totient is φ = 20013600.

The previous prime is 20757071. The next prime is 20757091. The reversal of 20757073 is 37075702.

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

It is not a de Polignac number, because 20757073 - 2¹ = 20757071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20757071) 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, 8565 + ... + 10717.

It is an arithmetic number, because the mean of its divisors is an integer number (2688192).

Almost surely, 2^20757073 is an apocalyptic number.

It is an amenable number.

20757073 is a deficient number, since it is larger than the sum of its proper divisors (748463).

20757073 is a wasteful number, since it uses less digits than its factorization.

20757073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495.

The product of its (nonzero) digits is 10290, while the sum is 31.

The square root of 20757073 is about 4555.9930860351. The cubic root of 20757073 is about 274.8244521492.

The spelling of 20757073 in words is "twenty million, seven hundred fifty-seven thousand, seventy-three".