20753707 has 12 divisors (see below), whose sum is σ = 23087280. Its totient is φ = 18633888.

The previous prime is 20753701. The next prime is 20753729. The reversal of 20753707 is 70735702.

It is not a de Polignac number, because 20753707 - 2³ = 20753699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20753701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4594 + ... + 7912.

It is an arithmetic number, because the mean of its divisors is an integer number (1923940).

Almost surely, 2^20753707 is an apocalyptic number.

20753707 is a deficient number, since it is larger than the sum of its proper divisors (2333573).

20753707 is a wasteful number, since it uses less digits than its factorization.

20753707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3382 (or 3369 counting only the distinct ones).

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

The square root of 20753707 is about 4555.6236675125. The cubic root of 20753707 is about 274.8095960226.

The spelling of 20753707 in words is "twenty million, seven hundred fifty-three thousand, seven hundred seven".