21010350 has 24 divisors (see below), whose sum is σ = 52106040. Its totient is φ = 5602720.

The previous prime is 21010337. The next prime is 21010357. The reversal of 21010350 is 5301012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010357) 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, 69885 + ... + 70184.

It is an arithmetic number, because the mean of its divisors is an integer number (2171085).

Almost surely, 2^21010350 is an apocalyptic number.

21010350 is an abundant number, since it is smaller than the sum of its proper divisors (31095690).

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

21010350 is a wasteful number, since it uses less digits than its factorization.

21010350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140084 (or 140079 counting only the distinct ones).

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

The square root of 21010350 is about 4583.7048334290. The cubic root of 21010350 is about 275.9377353768.

Adding to 21010350 its reverse (5301012), we get a palindrome (26311362).

The spelling of 21010350 in words is "twenty-one million, ten thousand, three hundred fifty".