20366649 has 12 divisors (see below), whose sum is σ = 30103216. Its totient is φ = 13261752.

The previous prime is 20366641. The next prime is 20366657. The reversal of 20366649 is 94666302.

It is an interprime number because it is at equal distance from previous prime (20366641) and next prime (20366657).

It is not a de Polignac number, because 20366649 - 2³ = 20366641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20366641) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 25927 + ... + 26700.

Almost surely, 2^20366649 is an apocalyptic number.

It is an amenable number.

20366649 is a deficient number, since it is larger than the sum of its proper divisors (9736567).

20366649 is a wasteful number, since it uses less digits than its factorization.

20366649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52676 (or 52673 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 20366649 is about 4512.9423882873. The cubic root of 20366649 is about 273.0904582897.

The spelling of 20366649 in words is "twenty million, three hundred sixty-six thousand, six hundred forty-nine".