21370350 has 24 divisors (see below), whose sum is σ = 52998840. Its totient is φ = 5698720.

The previous prime is 21370339. The next prime is 21370357. The reversal of 21370350 is 5307312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21370357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71085 + ... + 71384.

It is an arithmetic number, because the mean of its divisors is an integer number (2208285).

Almost surely, 2^21370350 is an apocalyptic number.

21370350 is an abundant number, since it is smaller than the sum of its proper divisors (31628490).

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

21370350 is a wasteful number, since it uses less digits than its factorization.

21370350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142484 (or 142479 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 21370350 is about 4622.8075884683. The cubic root of 21370350 is about 277.5048290694.

Adding to 21370350 its reverse (5307312), we get a palindrome (26677662).

The spelling of 21370350 in words is "twenty-one million, three hundred seventy thousand, three hundred fifty".