20945365 has 8 divisors (see below), whose sum is σ = 28725120. Its totient is φ = 14362512.

The previous prime is 20945363. The next prime is 20945369. The reversal of 20945365 is 56354902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20945365 - 2¹ = 20945363 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20945365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20945363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299185 + ... + 299254.

It is an arithmetic number, because the mean of its divisors is an integer number (3590640).

Almost surely, 2^20945365 is an apocalyptic number.

It is an amenable number.

20945365 is a deficient number, since it is larger than the sum of its proper divisors (7779755).

20945365 is an equidigital number, since it uses as much as digits as its factorization.

20945365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598451.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 20945365 is about 4576.6106454449. The cubic root of 20945365 is about 275.6529498106.

The spelling of 20945365 in words is "twenty million, nine hundred forty-five thousand, three hundred sixty-five".