20946575 has 12 divisors (see below), whose sum is σ = 27972168. Its totient is φ = 15468000.

The previous prime is 20946571. The next prime is 20946577. The reversal of 20946575 is 57564902.

It is a happy number.

It is not a de Polignac number, because 20946575 - 2² = 20946571 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 (20946571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31901 + ... + 32550.

It is an arithmetic number, because the mean of its divisors is an integer number (2331014).

Almost surely, 2^20946575 is an apocalyptic number.

20946575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20946575 is a deficient number, since it is larger than the sum of its proper divisors (7025593).

20946575 is a wasteful number, since it uses less digits than its factorization.

20946575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64474 (or 64469 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 20946575 is about 4576.7428374336. The cubic root of 20946575 is about 275.6582578051.

The spelling of 20946575 in words is "twenty million, nine hundred forty-six thousand, five hundred seventy-five".