21106050 has 48 divisors (see below), whose sum is σ = 59823552. Its totient is φ = 4824000.

The previous prime is 21106049. The next prime is 21106051. The reversal of 21106050 is 5060112.

It is an interprime number because it is at equal distance from previous prime (21106049) and next prime (21106051).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (21106051) 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, 9001 + ... + 11100.

It is an arithmetic number, because the mean of its divisors is an integer number (1246324).

Almost surely, 2^21106050 is an apocalyptic number.

21106050 is an abundant number, since it is smaller than the sum of its proper divisors (38717502).

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

21106050 is a wasteful number, since it uses less digits than its factorization.

21106050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20123 (or 20118 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 21106050 is about 4594.1321269637. The cubic root of 21106050 is about 276.3560569553.

Adding to 21106050 its reverse (5060112), we get a palindrome (26166162).

The spelling of 21106050 in words is "twenty-one million, one hundred six thousand, fifty".