21850544 has 10 divisors (see below), whose sum is σ = 42335460. Its totient is φ = 10925264.

The previous prime is 21850489. The next prime is 21850547. The reversal of 21850544 is 44505812.

It is not an unprimeable number, because it can be changed into a prime (21850547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682814 + ... + 682845.

It is an arithmetic number, because the mean of its divisors is an integer number (4233546).

Almost surely, 2^21850544 is an apocalyptic number.

It is an amenable number.

21850544 is a deficient number, since it is larger than the sum of its proper divisors (20484916).

21850544 is a wasteful number, since it uses less digits than its factorization.

21850544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365667 (or 1365661 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 21850544 is about 4674.4565459527. The cubic root of 21850544 is about 279.5679732016.

The spelling of 21850544 in words is "twenty-one million, eight hundred fifty thousand, five hundred forty-four".