21484750 has 32 divisors (see below), whose sum is σ = 45968832. Its totient is φ = 7365600.

The previous prime is 21484747. The next prime is 21484759. The reversal of 21484750 is 5748412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21484759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4389 + ... + 7888.

It is an arithmetic number, because the mean of its divisors is an integer number (1436526).

Almost surely, 2^21484750 is an apocalyptic number.

21484750 is an abundant number, since it is smaller than the sum of its proper divisors (24484082).

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

21484750 is a wasteful number, since it uses less digits than its factorization.

21484750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12301 (or 12291 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 21484750 is about 4635.1645062500. The cubic root of 21484750 is about 277.9991287518. Note that the first 3 decimals are identical.

The spelling of 21484750 in words is "twenty-one million, four hundred eighty-four thousand, seven hundred fifty".