20140464 has 40 divisors (see below), whose sum is σ = 52443072. Its totient is φ = 6660160.

The previous prime is 20140457. The next prime is 20140489. The reversal of 20140464 is 46404102.

It is a self number, because there is not a number n which added to its sum of digits gives 20140464.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4687 + ... + 7889.

Almost surely, 2^20140464 is an apocalyptic number.

20140464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20140464 is an abundant number, since it is smaller than the sum of its proper divisors (32302608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20140464 is a wasteful number, since it uses less digits than its factorization.

20140464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345 (or 3339 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 20140464 is about 4487.8128303217. The cubic root of 20140464 is about 272.0757430353.

Adding to 20140464 its reverse (46404102), we get a palindrome (66544566).

The spelling of 20140464 in words is "twenty million, one hundred forty thousand, four hundred sixty-four".