20345464 has 32 divisors (see below), whose sum is σ = 40640400. Its totient is φ = 9515520.

The previous prime is 20345453. The next prime is 20345477. The reversal of 20345464 is 46454302.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 28342 + ... + 29050.

Almost surely, 2^20345464 is an apocalyptic number.

It is an amenable number.

20345464 is a deficient number, since it is larger than the sum of its proper divisors (20294936).

20345464 is a wasteful number, since it uses less digits than its factorization.

20345464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943 (or 939 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 20345464 is about 4510.5946392909. The cubic root of 20345464 is about 272.9957376105.

Adding to 20345464 its reverse (46454302), we get a palindrome (66799766).

The spelling of 20345464 in words is "twenty million, three hundred forty-five thousand, four hundred sixty-four".