20752775 has 6 divisors (see below), whose sum is σ = 25733472. Its totient is φ = 16602200.

The previous prime is 20752763. The next prime is 20752799. The reversal of 20752775 is 57725702.

It is not a de Polignac number, because 20752775 - 2²⁰ = 19704199 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 415031 + ... + 415080.

It is an arithmetic number, because the mean of its divisors is an integer number (4288912).

Almost surely, 2^20752775 is an apocalyptic number.

20752775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20752775 is a deficient number, since it is larger than the sum of its proper divisors (4980697).

20752775 is an equidigital number, since it uses as much as digits as its factorization.

20752775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830121 (or 830116 counting only the distinct ones).

The product of its (nonzero) digits is 34300, while the sum is 35.

The square root of 20752775 is about 4555.5213752105. The cubic root of 20752775 is about 274.8054822775.

The spelling of 20752775 in words is "twenty million, seven hundred fifty-two thousand, seven hundred seventy-five".