20628753 has 4 divisors (see below), whose sum is σ = 27505008. Its totient is φ = 13752500.

The previous prime is 20628749. The next prime is 20628757. The reversal of 20628753 is 35782602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (20628749) and next prime (20628757).

It is a cyclic number.

It is not a de Polignac number, because 20628753 - 2² = 20628749 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20628757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3438123 + ... + 3438128.

It is an arithmetic number, because the mean of its divisors is an integer number (6876252).

Almost surely, 2^20628753 is an apocalyptic number.

It is an amenable number.

20628753 is a deficient number, since it is larger than the sum of its proper divisors (6876255).

20628753 is an equidigital number, since it uses as much as digits as its factorization.

20628753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6876254.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20628753 is about 4541.8887040525. Note that the first 3 decimals coincide. The cubic root of 20628753 is about 274.2569605352.

The spelling of 20628753 in words is "twenty million, six hundred twenty-eight thousand, seven hundred fifty-three".