21838050 has 72 divisors (see below), whose sum is σ = 63201684. Its totient is φ = 5374080.

The previous prime is 21838027. The next prime is 21838057. The reversal of 21838050 is 5083812.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4524129 + 17313921 = 2127^2 + 4161^2 .

It is not an unprimeable number, because it can be changed into a prime (21838057) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3984 + ... + 7716.

Almost surely, 2^21838050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21838050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31600842).

21838050 is an abundant number, since it is smaller than the sum of its proper divisors (41363634).

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

21838050 is a wasteful number, since it uses less digits than its factorization.

21838050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3764 (or 3756 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 21838050 is about 4673.1199428219. The cubic root of 21838050 is about 279.5146779883.

The spelling of 21838050 in words is "twenty-one million, eight hundred thirty-eight thousand, fifty".