21013001445 has 16 divisors (see below), whose sum is σ = 33918334272. Its totient is φ = 11107756800.

The previous prime is 21013001407. The next prime is 21013001461. The reversal of 21013001445 is 54410031012.

It is not a de Polignac number, because 21013001445 - 2⁶ = 21013001381 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 6196831 + ... + 6200220.

It is an arithmetic number, because the mean of its divisors is an integer number (2119895892).

Almost surely, 2^21013001445 is an apocalyptic number.

It is an amenable number.

21013001445 is a deficient number, since it is larger than the sum of its proper divisors (12905332827).

21013001445 is a wasteful number, since it uses less digits than its factorization.

21013001445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12397172.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21013001445 its reverse (54410031012), we get a palindrome (75423032457).

The spelling of 21013001445 in words is "twenty-one billion, thirteen million, one thousand, four hundred forty-five".