21802150 has 24 divisors (see below), whose sum is σ = 40856760. Its totient is φ = 8655360.

The previous prime is 21802141. The next prime is 21802159. The reversal of 21802150 is 5120812.

It is an interprime number because it is at equal distance from previous prime (21802141) and next prime (21802159).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21802159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5382 + ... + 8518.

It is an arithmetic number, because the mean of its divisors is an integer number (1702365).

Almost surely, 2^21802150 is an apocalyptic number.

21802150 is a deficient number, since it is larger than the sum of its proper divisors (19054610).

21802150 is a wasteful number, since it uses less digits than its factorization.

21802150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3288 (or 3283 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 21802150 is about 4669.2772459986. The cubic root of 21802150 is about 279.3614274211.

Adding to 21802150 its reverse (5120812), we get a palindrome (26922962).

It can be divided in two parts, 21802 and 150, that added together give a cube (21952 = 28³).

The spelling of 21802150 in words is "twenty-one million, eight hundred two thousand, one hundred fifty".