21880150 has 24 divisors (see below), whose sum is σ = 41392440. Its totient is φ = 8602560.

The previous prime is 21880147. The next prime is 21880169. The reversal of 21880150 is 5108812.

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 11 ways as a sum of consecutive naturals, for example, 759 + ... + 6658.

It is an arithmetic number, because the mean of its divisors is an integer number (1724685).

Almost surely, 2^21880150 is an apocalyptic number.

21880150 is a deficient number, since it is larger than the sum of its proper divisors (19512290).

21880150 is a wasteful number, since it uses less digits than its factorization.

21880150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7488 (or 7483 counting only the distinct ones).

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

The square root of 21880150 is about 4677.6222592253. The cubic root of 21880150 is about 279.6941814098.

Adding to 21880150 its reverse (5108812), we get a palindrome (26988962).

The spelling of 21880150 in words is "twenty-one million, eight hundred eighty thousand, one hundred fifty".