21020020033313 has 16 divisors (see below), whose sum is σ = 24890484685440. Its totient is φ = 17375075133696.

The previous prime is 21020020033291. The next prime is 21020020033391. The reversal of 21020020033313 is 31333002002012.

It is not a de Polignac number, because 21020020033313 - 2¹⁴ = 21020020016929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020020033013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 359078603 + ... + 359137136.

It is an arithmetic number, because the mean of its divisors is an integer number (1555655292840).

Almost surely, 2^{21020020033313} is an apocalyptic number.

It is an amenable number.

21020020033313 is a deficient number, since it is larger than the sum of its proper divisors (3870464652127).

21020020033313 is a wasteful number, since it uses less digits than its factorization.

21020020033313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718215896.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21020020033313 its reverse (31333002002012), we get a palindrome (52353022035325).

The spelling of 21020020033313 in words is "twenty-one trillion, twenty billion, twenty million, thirty-three thousand, three hundred thirteen".