21463750 has 80 divisors (see below), whose sum is σ = 50383872. Its totient is φ = 6660000.

The previous prime is 21463721. The next prime is 21463759. The reversal of 21463750 is 5736412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21463759) 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 39 ways as a sum of consecutive naturals, for example, 96139 + ... + 96361.

Almost surely, 2^21463750 is an apocalyptic number.

21463750 is an abundant number, since it is smaller than the sum of its proper divisors (28920122).

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

21463750 is a wasteful number, since it uses less digits than its factorization.

21463750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 21463750 is about 4632.8986606659. The cubic root of 21463750 is about 277.9085236354.

The spelling of 21463750 in words is "twenty-one million, four hundred sixty-three thousand, seven hundred fifty".