21134750 has 64 divisors (see below), whose sum is σ = 48746880. Its totient is φ = 6681600.

The previous prime is 21134749. The next prime is 21134753. The reversal of 21134750 is 5743112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134753) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22286 + ... + 23214.

It is an arithmetic number, because the mean of its divisors is an integer number (761670).

Almost surely, 2^21134750 is an apocalyptic number.

21134750 is an abundant number, since it is smaller than the sum of its proper divisors (27612130).

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

21134750 is a wasteful number, since it uses less digits than its factorization.

21134750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966 (or 956 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 21134750 is about 4597.2546155287. The cubic root of 21134750 is about 276.4812631797.

Adding to 21134750 its reverse (5743112), we get a palindrome (26877862).

The spelling of 21134750 in words is "twenty-one million, one hundred thirty-four thousand, seven hundred fifty".