20864364 has 24 divisors (see below), whose sum is σ = 50254848. Its totient is φ = 6730320.

The previous prime is 20864357. The next prime is 20864387. The reversal of 20864364 is 46346802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27672 + ... + 28415.

It is an arithmetic number, because the mean of its divisors is an integer number (2093952).

Almost surely, 2^20864364 is an apocalyptic number.

It is an amenable number.

20864364 is an abundant number, since it is smaller than the sum of its proper divisors (29390484).

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

20864364 is a wasteful number, since it uses less digits than its factorization.

20864364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56125 (or 56123 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 20864364 is about 4567.7526202718. The cubic root of 20864364 is about 275.2971509745.

The spelling of 20864364 in words is "twenty million, eight hundred sixty-four thousand, three hundred sixty-four".