21063484 has 18 divisors (see below), whose sum is σ = 39915960. Its totient is φ = 9721296.

The previous prime is 21063481. The next prime is 21063503. The reversal of 21063484 is 48436012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21063481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14904 + ... + 16255.

Almost surely, 2^21063484 is an apocalyptic number.

It is an amenable number.

21063484 is a deficient number, since it is larger than the sum of its proper divisors (18852476).

21063484 is a wasteful number, since it uses less digits than its factorization.

21063484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31189 (or 31174 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 21063484 is about 4589.4971402105. The cubic root of 21063484 is about 276.1701499319.

Adding to 21063484 its reverse (48436012), we get a palindrome (69499496).

The spelling of 21063484 in words is "twenty-one million, sixty-three thousand, four hundred eighty-four".