20130465 has 32 divisors (see below), whose sum is σ = 34525440. Its totient is φ = 9979904.

The previous prime is 20130457. The next prime is 20130469. The reversal of 20130465 is 56403102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20130465 - 2³ = 20130457 is a prime.

It is a super-2 number, since 2×20130465² = 810471242232450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20130469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22252 + ... + 23138.

It is an arithmetic number, because the mean of its divisors is an integer number (1078920).

Almost surely, 2^20130465 is an apocalyptic number.

It is an amenable number.

20130465 is a deficient number, since it is larger than the sum of its proper divisors (14394975).

20130465 is a wasteful number, since it uses less digits than its factorization.

20130465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20130465 is about 4486.6986749725. The cubic root of 20130465 is about 272.0307103805.

Adding to 20130465 its reverse (56403102), we get a palindrome (76533567).

The spelling of 20130465 in words is "twenty million, one hundred thirty thousand, four hundred sixty-five".