20364387 has 4 divisors (see below), whose sum is σ = 27152520. Its totient is φ = 13576256.

The previous prime is 20364373. The next prime is 20364391. The reversal of 20364387 is 78346302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20364387 - 2¹¹ = 20362339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20364287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3394062 + ... + 3394067.

It is an arithmetic number, because the mean of its divisors is an integer number (6788130).

Almost surely, 2^20364387 is an apocalyptic number.

20364387 is a deficient number, since it is larger than the sum of its proper divisors (6788133).

20364387 is an equidigital number, since it uses as much as digits as its factorization.

20364387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6788132.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 20364387 is about 4512.6917687784. The cubic root of 20364387 is about 273.0803477493.

The spelling of 20364387 in words is "twenty million, three hundred sixty-four thousand, three hundred eighty-seven".