21013545002 has 16 divisors (see below), whose sum is σ = 31722723360. Its totient is φ = 10439340912.

The previous prime is 21013544953. The next prime is 21013545017. The reversal of 21013545002 is 20054531012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1536149 + ... + 1549767.

It is an arithmetic number, because the mean of its divisors is an integer number (1982670210).

Almost surely, 2^21013545002 is an apocalyptic number.

21013545002 is a deficient number, since it is larger than the sum of its proper divisors (10709178358).

21013545002 is a wasteful number, since it uses less digits than its factorization.

21013545002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18517.

The product of its (nonzero) digits is 1200, while the sum is 23.

The spelling of 21013545002 in words is "twenty-one billion, thirteen million, five hundred forty-five thousand, two".