21059745484 has 24 divisors (see below), whose sum is σ = 38472039648. Its totient is φ = 10068094080.

The previous prime is 21059745481. The next prime is 21059745541. The reversal of 21059745484 is 48454795012.

It is not an unprimeable number, because it can be changed into a prime (21059745481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197464 + ... + 284800.

It is an arithmetic number, because the mean of its divisors is an integer number (1603001652).

Almost surely, 2^21059745484 is an apocalyptic number.

It is an amenable number.

21059745484 is a deficient number, since it is larger than the sum of its proper divisors (17412294164).

21059745484 is a wasteful number, since it uses less digits than its factorization.

21059745484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89985 (or 89983 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 21059745484 in words is "twenty-one billion, fifty-nine million, seven hundred forty-five thousand, four hundred eighty-four".