20756245 has 8 divisors (see below), whose sum is σ = 25104384. Its totient is φ = 16473744.

The previous prime is 20756243. The next prime is 20756261. The reversal of 20756245 is 54265702.

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 20756245 - 2¹ = 20756243 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 (20756243) 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, 15709 + ... + 16978.

It is an arithmetic number, because the mean of its divisors is an integer number (3138048).

Almost surely, 2^20756245 is an apocalyptic number.

It is an amenable number.

20756245 is a deficient number, since it is larger than the sum of its proper divisors (4348139).

20756245 is a wasteful number, since it uses less digits than its factorization.

20756245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32819.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 20756245 is about 4555.9022158075. The cubic root of 20756245 is about 274.8207978499.

The spelling of 20756245 in words is "twenty million, seven hundred fifty-six thousand, two hundred forty-five".