20893964 has 48 divisors (see below), whose sum is σ = 45788736. Its totient is φ = 8121600.

The previous prime is 20893963. The next prime is 20893967. The reversal of 20893964 is 46939802.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20893963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21734 + ... + 22674.

It is an arithmetic number, because the mean of its divisors is an integer number (953932).

Almost surely, 2^20893964 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 20893964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22894368).

20893964 is an abundant number, since it is smaller than the sum of its proper divisors (24894772).

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

20893964 is a wasteful number, since it uses less digits than its factorization.

20893964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026 (or 1024 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 20893964 is about 4570.9915773276. The cubic root of 20893964 is about 275.4272762792.

The spelling of 20893964 in words is "twenty million, eight hundred ninety-three thousand, nine hundred sixty-four".