20066464 has 48 divisors (see below), whose sum is σ = 43575840. Its totient is φ = 9020160.

The previous prime is 20066461. The next prime is 20066467. The reversal of 20066464 is 46466002.

It is an interprime number because it is at equal distance from previous prime (20066461) and next prime (20066467).

It is not an unprimeable number, because it can be changed into a prime (20066461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38107 + ... + 38629.

It is an arithmetic number, because the mean of its divisors is an integer number (907830).

Almost surely, 2^20066464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20066464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21787920).

20066464 is an abundant number, since it is smaller than the sum of its proper divisors (23509376).

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

20066464 is a wasteful number, since it uses less digits than its factorization.

20066464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 20066464 is about 4479.5606927466. The cubic root of 20066464 is about 271.7421142816.

The spelling of 20066464 in words is "twenty million, sixty-six thousand, four hundred sixty-four".