20877120 has 168 divisors, whose sum is σ = 78455520. Its totient is φ = 5053440.

The previous prime is 20877113. The next prime is 20877127. The reversal of 20877120 is 2177802.

It is an interprime number because it is at equal distance from previous prime (20877113) and next prime (20877127).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20877127) 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, 31351 + ... + 32009.

Almost surely, 2^20877120 is an apocalyptic number.

20877120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20877120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39227760).

20877120 is an abundant number, since it is smaller than the sum of its proper divisors (57578400).

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

20877120 is a wasteful number, since it uses less digits than its factorization.

20877120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 680 counting only the distinct ones).

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

The square root of 20877120 is about 4569.1487172120. The cubic root of 20877120 is about 275.3532430276.

The spelling of 20877120 in words is "twenty million, eight hundred seventy-seven thousand, one hundred twenty".