21700150 has 24 divisors (see below), whose sum is σ = 40682664. Its totient is φ = 8611200.

The previous prime is 21700127. The next prime is 21700169. The reversal of 21700150 is 5100712.

It is a congruent number.

It is an unprimeable number.

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, 4894 + ... + 8206.

It is an arithmetic number, because the mean of its divisors is an integer number (1695111).

Almost surely, 2^21700150 is an apocalyptic number.

21700150 is a deficient number, since it is larger than the sum of its proper divisors (18982514).

21700150 is a wasteful number, since it uses less digits than its factorization.

21700150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456 (or 3451 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 21700150 is about 4658.3419797177. The cubic root of 21700150 is about 278.9250879071.

Adding to 21700150 its reverse (5100712), we get a palindrome (26800862).

The spelling of 21700150 in words is "twenty-one million, seven hundred thousand, one hundred fifty".