21032013530 has 64 divisors (see below), whose sum is σ = 41643372672. Its totient is φ = 7584541440.

The previous prime is 21032013523. The next prime is 21032013547. The reversal of 21032013530 is 3531023012.

It is a super-2 number, since 2×21032013530² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7518092 + ... + 7520888.

It is an arithmetic number, because the mean of its divisors is an integer number (650677698).

Almost surely, 2^21032013530 is an apocalyptic number.

21032013530 is a deficient number, since it is larger than the sum of its proper divisors (20611359142).

21032013530 is a wasteful number, since it uses less digits than its factorization.

21032013530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359.

The product of its (nonzero) digits is 540, while the sum is 20.

Adding to 21032013530 its reverse (3531023012), we get a palindrome (24563036542).

The spelling of 21032013530 in words is "twenty-one billion, thirty-two million, thirteen thousand, five hundred thirty".