20380465 has 8 divisors (see below), whose sum is σ = 27950400. Its totient is φ = 13975152.

The previous prime is 20380457. The next prime is 20380471. The reversal of 20380465 is 56408302.

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 20380465 - 2³ = 20380457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291115 + ... + 291184.

It is an arithmetic number, because the mean of its divisors is an integer number (3493800).

Almost surely, 2^20380465 is an apocalyptic number.

It is an amenable number.

20380465 is a deficient number, since it is larger than the sum of its proper divisors (7569935).

20380465 is an equidigital number, since it uses as much as digits as its factorization.

20380465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582311.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20380465 is about 4514.4728374418. The cubic root of 20380465 is about 273.1521959036.

Adding to 20380465 its reverse (56408302), we get a palindrome (76788767).

The spelling of 20380465 in words is "twenty million, three hundred eighty thousand, four hundred sixty-five".