21116750 has 16 divisors (see below), whose sum is σ = 39531024. Its totient is φ = 8446600.

The previous prime is 21116731. The next prime is 21116759. The reversal of 21116750 is 5761112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21116759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41984 + ... + 42483.

It is an arithmetic number, because the mean of its divisors is an integer number (2470689).

Almost surely, 2^21116750 is an apocalyptic number.

21116750 is a deficient number, since it is larger than the sum of its proper divisors (18414274).

21116750 is an equidigital number, since it uses as much as digits as its factorization.

21116750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84484 (or 84474 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 21116750 is about 4595.2965083877. The cubic root of 21116750 is about 276.4027498901.

Adding to 21116750 its reverse (5761112), we get a palindrome (26877862).

It can be divided in two parts, 211 and 16750, that added together give a palindrome (16961).

The spelling of 21116750 in words is "twenty-one million, one hundred sixteen thousand, seven hundred fifty".