20755473 has 4 divisors (see below), whose sum is σ = 27673968. Its totient is φ = 13836980.

The previous prime is 20755463. The next prime is 20755507. The reversal of 20755473 is 37455702.

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 a cyclic number.

It is not a de Polignac number, because 20755473 - 2⁴ = 20755457 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20755463) 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, 3459243 + ... + 3459248.

It is an arithmetic number, because the mean of its divisors is an integer number (6918492).

Almost surely, 2^20755473 is an apocalyptic number.

It is an amenable number.

20755473 is a deficient number, since it is larger than the sum of its proper divisors (6918495).

20755473 is an equidigital number, since it uses as much as digits as its factorization.

20755473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6918494.

The product of its (nonzero) digits is 29400, while the sum is 33.

The square root of 20755473 is about 4555.8174897597. The cubic root of 20755473 is about 274.8173906137.

The spelling of 20755473 in words is "twenty million, seven hundred fifty-five thousand, four hundred seventy-three".