20752601 has 16 divisors (see below), whose sum is σ = 22619520. Its totient is φ = 18986880.

The previous prime is 20752591. The next prime is 20752607. The reversal of 20752601 is 10625702.

20752601 = 43² + 44² + ... + 396².

It is a cyclic number.

It is not a de Polignac number, because 20752601 - 2¹⁴ = 20736217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20752607) 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 15 ways as a sum of consecutive naturals, for example, 55451 + ... + 55823.

It is an arithmetic number, because the mean of its divisors is an integer number (1413720).

Almost surely, 2^20752601 is an apocalyptic number.

It is an amenable number.

20752601 is a deficient number, since it is larger than the sum of its proper divisors (1866919).

20752601 is a wasteful number, since it uses less digits than its factorization.

20752601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20752601 is about 4555.5022774662. The cubic root of 20752601 is about 274.8047142471.

The spelling of 20752601 in words is "twenty million, seven hundred fifty-two thousand, six hundred one".