20877912 has 160 divisors (see below), whose sum is σ = 66646800. Its totient is φ = 6048000.

The previous prime is 20877907. The next prime is 20877931. The reversal of 20877912 is 21977802.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 206662 + ... + 206762.

Almost surely, 2^20877912 is an apocalyptic number.

20877912 is a gapful number since it is divisible by the number (22) 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 20877912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33323400).

20877912 is an abundant number, since it is smaller than the sum of its proper divisors (45768888).

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

20877912 is a wasteful number, since it uses less digits than its factorization.

20877912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 20877912 is about 4569.2353846131. The cubic root of 20877912 is about 275.3567249417.

It can be divided in two parts, 2087 and 7912, that added together give a palindrome (9999).

The spelling of 20877912 in words is "twenty million, eight hundred seventy-seven thousand, nine hundred twelve".