20877012 has 72 divisors (see below), whose sum is σ = 58705920. Its totient is φ = 6212160.

The previous prime is 20877011. The next prime is 20877047. The reversal of 20877012 is 21077802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20877011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13789 + ... + 15227.

It is an arithmetic number, because the mean of its divisors is an integer number (815360).

Almost surely, 2^20877012 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 20877012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29352960).

20877012 is an abundant number, since it is smaller than the sum of its proper divisors (37828908).

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

20877012 is a wasteful number, since it uses less digits than its factorization.

20877012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493 (or 1488 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 20877012 is about 4569.1368988027. The cubic root of 20877012 is about 275.3527682144.

The spelling of 20877012 in words is "twenty million, eight hundred seventy-seven thousand, twelve".