20933976 has 64 divisors (see below), whose sum is σ = 61056000. Its totient is φ = 5978784.

The previous prime is 20933947. The next prime is 20933977. The reversal of 20933976 is 67933902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20933977) 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, 6961 + ... + 9503.

It is an arithmetic number, because the mean of its divisors is an integer number (954000).

Almost surely, 2^20933976 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 20933976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30528000).

20933976 is an abundant number, since it is smaller than the sum of its proper divisors (40122024).

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

20933976 is a wasteful number, since it uses less digits than its factorization.

20933976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573 (or 2555 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 39.

The square root of 20933976 is about 4575.3662148510. The cubic root of 20933976 is about 275.6029788403.

The spelling of 20933976 in words is "twenty million, nine hundred thirty-three thousand, nine hundred seventy-six".