20746297 has 20 divisors (see below), whose sum is σ = 24801700. Its totient is φ = 17249760.

The previous prime is 20746291. The next prime is 20746301. The reversal of 20746297 is 79264702.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8433216 + 12313081 = 2904^2 + 3509^2 .

It is not a de Polignac number, because 20746297 - 2³ = 20746289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20746291) 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 19 ways as a sum of consecutive naturals, for example, 190279 + ... + 190387.

It is an arithmetic number, because the mean of its divisors is an integer number (1240085).

Almost surely, 2^20746297 is an apocalyptic number.

It is an amenable number.

20746297 is a deficient number, since it is larger than the sum of its proper divisors (4055403).

20746297 is an equidigital number, since it uses as much as digits as its factorization.

20746297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 20746297 is about 4554.8103143819. The cubic root of 20746297 is about 274.7768856975.

The spelling of 20746297 in words is "twenty million, seven hundred forty-six thousand, two hundred ninety-seven".