21037350 has 24 divisors (see below), whose sum is σ = 52173000. Its totient is φ = 5609920.

The previous prime is 21037339. The next prime is 21037361. The reversal of 21037350 is 5373012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21037339) and next prime (21037361).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69975 + ... + 70274.

It is an arithmetic number, because the mean of its divisors is an integer number (2173875).

Almost surely, 2^21037350 is an apocalyptic number.

21037350 is an abundant number, since it is smaller than the sum of its proper divisors (31135650).

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

21037350 is a wasteful number, since it uses less digits than its factorization.

21037350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140264 (or 140259 counting only the distinct ones).

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

The square root of 21037350 is about 4586.6491036485. The cubic root of 21037350 is about 276.0558855537.

It can be divided in two parts, 2103 and 7350, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 21037350 in words is "twenty-one million, thirty-seven thousand, three hundred fifty".