20045464 has 8 divisors (see below), whose sum is σ = 37585260. Its totient is φ = 10022728.

The previous prime is 20045461. The next prime is 20045471. The reversal of 20045464 is 46454002.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045461) by changing a digit.

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 as a sum of consecutive naturals, namely, 1252834 + ... + 1252849.

Almost surely, 2^20045464 is an apocalyptic number.

It is an amenable number.

20045464 is a deficient number, since it is larger than the sum of its proper divisors (17539796).

20045464 is a wasteful number, since it uses less digits than its factorization.

20045464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505689 (or 2505685 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 20045464 is about 4477.2160993189. The cubic root of 20045464 is about 271.6472864759.

Adding to 20045464 its reverse (46454002), we get a palindrome (66499466).

The spelling of 20045464 in words is "twenty million, forty-five thousand, four hundred sixty-four".