21045420569513 has 8 divisors (see below), whose sum is σ = 21960567056448. Its totient is φ = 20130284766064.

The previous prime is 21045420569471. The next prime is 21045420569521. The reversal of 21045420569513 is 31596502454012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21045420569513 - 2⁶ = 21045420569449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21045420599513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1492706 + ... + 6657252.

It is an arithmetic number, because the mean of its divisors is an integer number (2745070882056).

Almost surely, 2^{21045420569513} is an apocalyptic number.

21045420569513 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21045420569513 is a deficient number, since it is larger than the sum of its proper divisors (915146486935).

21045420569513 is a wasteful number, since it uses less digits than its factorization.

21045420569513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5341743.

The product of its (nonzero) digits is 1296000, while the sum is 47.

The spelling of 21045420569513 in words is "twenty-one trillion, forty-five billion, four hundred twenty million, five hundred sixty-nine thousand, five hundred thirteen".