20675264 has 56 divisors (see below), whose sum is σ = 44915328. Its totient is φ = 9400320.

The previous prime is 20675261. The next prime is 20675273. The reversal of 20675264 is 46257602.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 20675264.

It is not an unprimeable number, because it can be changed into a prime (20675261) 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 in 7 ways as a sum of consecutive naturals, for example, 33422 + ... + 34034.

Almost surely, 2^20675264 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 20675264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22457664).

20675264 is an abundant number, since it is smaller than the sum of its proper divisors (24240064).

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

20675264 is a wasteful number, since it uses less digits than its factorization.

20675264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 20675264 is about 4547.0060479397. The cubic root of 20675264 is about 274.4629253304.

The spelling of 20675264 in words is "twenty million, six hundred seventy-five thousand, two hundred sixty-four".