21310050 has 24 divisors (see below), whose sum is σ = 52849296. Its totient is φ = 5682640.

The previous prime is 21310049. The next prime is 21310057. The reversal of 21310050 is 5001312.

It is not an unprimeable number, because it can be changed into a prime (21310057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70884 + ... + 71183.

It is an arithmetic number, because the mean of its divisors is an integer number (2202054).

Almost surely, 2^21310050 is an apocalyptic number.

21310050 is an abundant number, since it is smaller than the sum of its proper divisors (31539246).

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

21310050 is a wasteful number, since it uses less digits than its factorization.

21310050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142082 (or 142077 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 21310050 is about 4616.2809706516. The cubic root of 21310050 is about 277.2435745004.

Adding to 21310050 its reverse (5001312), we get a palindrome (26311362).

The spelling of 21310050 in words is "twenty-one million, three hundred ten thousand, fifty".