20881150 has 12 divisors (see below), whose sum is σ = 38839032. Its totient is φ = 8352440.

The previous prime is 20881141. The next prime is 20881163. The reversal of 20881150 is 5118802.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 208762 + ... + 208861.

It is an arithmetic number, because the mean of its divisors is an integer number (3236586).

Almost surely, 2^20881150 is an apocalyptic number.

20881150 is a deficient number, since it is larger than the sum of its proper divisors (17957882).

20881150 is a wasteful number, since it uses less digits than its factorization.

20881150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417635 (or 417630 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 20881150 is about 4569.5896971172. The cubic root of 20881150 is about 275.3709594268.

Adding to 20881150 its reverse (5118802), we get a palindrome (25999952).

The spelling of 20881150 in words is "twenty million, eight hundred eighty-one thousand, one hundred fifty".