21342350 has 24 divisors (see below), whose sum is σ = 40021248. Its totient is φ = 8467200.

The previous prime is 21342341. The next prime is 21342359. The reversal of 21342350 is 5324312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21342341) and next prime (21342359).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4670 + ... + 8030.

It is an arithmetic number, because the mean of its divisors is an integer number (1667552).

Almost surely, 2^21342350 is an apocalyptic number.

21342350 is a deficient number, since it is larger than the sum of its proper divisors (18678898).

21342350 is a wasteful number, since it uses less digits than its factorization.

21342350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500 (or 3495 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 21342350 is about 4619.7781332008. The cubic root of 21342350 is about 277.3835780334.

Adding to 21342350 its reverse (5324312), we get a palindrome (26666662).

The spelling of 21342350 in words is "twenty-one million, three hundred forty-two thousand, three hundred fifty".