20546369 has 2 divisors, whose sum is σ = 20546370. Its totient is φ = 20546368.

The previous prime is 20546341. The next prime is 20546377. The reversal of 20546369 is 96364502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13786369 + 6760000 = 3713^2 + 2600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20546369 is a prime.

It is a super-2 number, since 2×20546369² = 844306558168322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20546269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10273184 + 10273185.

It is an arithmetic number, because the mean of its divisors is an integer number (10273185).

Almost surely, 2^20546369 is an apocalyptic number.

It is an amenable number.

20546369 is a deficient number, since it is larger than the sum of its proper divisors (1).

20546369 is an equidigital number, since it uses as much as digits as its factorization.

20546369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 20546369 is about 4532.8102761973. The cubic root of 20546369 is about 273.8913780824.

The spelling of 20546369 in words is "twenty million, five hundred forty-six thousand, three hundred sixty-nine".