21112950 has 48 divisors (see below), whose sum is σ = 53652816. Its totient is φ = 5491200.

The previous prime is 21112913. The next prime is 21112951. The reversal of 21112950 is 5921112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112951) 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, 4434 + ... + 7866.

It is an arithmetic number, because the mean of its divisors is an integer number (1117767).

Almost surely, 2^21112950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21112950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26826408).

21112950 is an abundant number, since it is smaller than the sum of its proper divisors (32539866).

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

21112950 is a wasteful number, since it uses less digits than its factorization.

21112950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3489 (or 3484 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 21112950 is about 4594.8830235382. The cubic root of 21112950 is about 276.3861691590.

The spelling of 21112950 in words is "twenty-one million, one hundred twelve thousand, nine hundred fifty".