21022050 has 48 divisors (see below), whose sum is σ = 59585472. Its totient is φ = 4804800.

The previous prime is 21022049. The next prime is 21022051. The reversal of 21022050 is 5022012.

It is an interprime number because it is at equal distance from previous prime (21022049) and next prime (21022051).

It is not an unprimeable number, because it can be changed into a prime (21022051) 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, 8961 + ... + 11060.

It is an arithmetic number, because the mean of its divisors is an integer number (1241364).

Almost surely, 2^21022050 is an apocalyptic number.

21022050 is an abundant number, since it is smaller than the sum of its proper divisors (38563422).

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

21022050 is a wasteful number, since it uses less digits than its factorization.

21022050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20043 (or 20038 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 21022050 is about 4584.9809159908. The cubic root of 21022050 is about 275.9889462072.

Adding to 21022050 its reverse (5022012), we get a palindrome (26044062).

The spelling of 21022050 in words is "twenty-one million, twenty-two thousand, fifty".