20765464 has 8 divisors (see below), whose sum is σ = 38935260. Its totient is φ = 10382728.

The previous prime is 20765447. The next prime is 20765467. The reversal of 20765464 is 46456702.

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 (20765467) 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, 1297834 + ... + 1297849.

Almost surely, 2^20765464 is an apocalyptic number.

It is an amenable number.

20765464 is a deficient number, since it is larger than the sum of its proper divisors (18169796).

20765464 is a wasteful number, since it uses less digits than its factorization.

20765464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595689 (or 2595685 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 20765464 is about 4556.9138679593. The cubic root of 20765464 is about 274.8614795488.

The spelling of 20765464 in words is "twenty million, seven hundred sixty-five thousand, four hundred sixty-four".