21750463 has 12 divisors (see below), whose sum is σ = 26790912. Its totient is φ = 17545920.

The previous prime is 21750461. The next prime is 21750467. The reversal of 21750463 is 36405712.

It is not a de Polignac number, because 21750463 - 2¹ = 21750461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21750461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12223 + ... + 13888.

It is an arithmetic number, because the mean of its divisors is an integer number (2232576).

Almost surely, 2^21750463 is an apocalyptic number.

21750463 is a deficient number, since it is larger than the sum of its proper divisors (5040449).

21750463 is a wasteful number, since it uses less digits than its factorization.

21750463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26142 (or 26135 counting only the distinct ones).

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

The square root of 21750463 is about 4663.7391650906. The cubic root of 21750463 is about 279.1404892758.

The spelling of 21750463 in words is "twenty-one million, seven hundred fifty thousand, four hundred sixty-three".