21996150 has 48 divisors (see below), whose sum is σ = 59514048. Its totient is φ = 5332000.

The previous prime is 21996127. The next prime is 21996151. The reversal of 21996150 is 5169912.

It is a super-2 number, since 2×21996150² = 967661229645000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21996151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5016 + ... + 8315.

It is an arithmetic number, because the mean of its divisors is an integer number (1239876).

Almost surely, 2^21996150 is an apocalyptic number.

21996150 is an abundant number, since it is smaller than the sum of its proper divisors (37517898).

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

21996150 is a wasteful number, since it uses less digits than its factorization.

21996150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13357 (or 13352 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 21996150 is about 4690.0053304874. The cubic root of 21996150 is about 280.1875868825.

It can be divided in two parts, 219 and 96150, that added together give a palindrome (96369).

The spelling of 21996150 in words is "twenty-one million, nine hundred ninety-six thousand, one hundred fifty".