20877472 has 96 divisors (see below), whose sum is σ = 52859520. Its totient is φ = 7879680.

The previous prime is 20877449. The next prime is 20877481. The reversal of 20877472 is 27477802.

It is a super-2 number, since 2×20877472² = 871737674221568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91054 + ... + 91282.

It is an arithmetic number, because the mean of its divisors is an integer number (550620).

Almost surely, 2^20877472 is an apocalyptic number.

20877472 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 20877472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26429760).

20877472 is an abundant number, since it is smaller than the sum of its proper divisors (31982048).

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

20877472 is a wasteful number, since it uses less digits than its factorization.

20877472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 20877472 is about 4569.1872362599. The cubic root of 20877472 is about 275.3547905559.

It can be divided in two parts, 2087 and 7472, that added together give a palindrome (9559).

The spelling of 20877472 in words is "twenty million, eight hundred seventy-seven thousand, four hundred seventy-two".