20145464 has 16 divisors (see below), whose sum is σ = 38794200. Its totient is φ = 9800352.

The previous prime is 20145449. The next prime is 20145487. The reversal of 20145464 is 46454102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33734 + ... + 34325.

Almost surely, 2^20145464 is an apocalyptic number.

It is an amenable number.

20145464 is a deficient number, since it is larger than the sum of its proper divisors (18648736).

20145464 is a wasteful number, since it uses less digits than its factorization.

20145464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68102 (or 68098 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 20145464 is about 4488.3698599826. The cubic root of 20145464 is about 272.0982560247.

Adding to 20145464 its reverse (46454102), we get a palindrome (66599566).

The spelling of 20145464 in words is "twenty million, one hundred forty-five thousand, four hundred sixty-four".