20753081 has 8 divisors (see below), whose sum is σ = 20995200. Its totient is φ = 20512720.

The previous prime is 20753059. The next prime is 20753099. The reversal of 20753081 is 18035702.

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 20753081 - 2⁶ = 20753017 is a prime.

It is a super-2 number, since 2×20753081² = 861380741985122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20753081.

It is not an unprimeable number, because it can be changed into a prime (20753281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47936 + ... + 48366.

It is an arithmetic number, because the mean of its divisors is an integer number (2624400).

Almost surely, 2^20753081 is an apocalyptic number.

It is an amenable number.

20753081 is a deficient number, since it is larger than the sum of its proper divisors (242119).

20753081 is a wasteful number, since it uses less digits than its factorization.

20753081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20753081 is about 4555.5549607046. The cubic root of 20753081 is about 274.8068329413.

Adding to 20753081 its reverse (18035702), we get a palindrome (38788783).

The spelling of 20753081 in words is "twenty million, seven hundred fifty-three thousand, eighty-one".