20933205013 has 4 divisors (see below), whose sum is σ = 23923662880. Its totient is φ = 17942747148.

The previous prime is 20933204969. The next prime is 20933205019. The reversal of 20933205013 is 31050233902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31050233902 = 2 ⋅15525116951.

It is a cyclic number.

It is not a de Polignac number, because 20933205013 - 2²¹ = 20931107861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20933205019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1495228923 + ... + 1495228936.

It is an arithmetic number, because the mean of its divisors is an integer number (5980915720).

Almost surely, 2^20933205013 is an apocalyptic number.

It is an amenable number.

20933205013 is a deficient number, since it is larger than the sum of its proper divisors (2990457867).

20933205013 is an equidigital number, since it uses as much as digits as its factorization.

20933205013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2990457866.

The product of its (nonzero) digits is 4860, while the sum is 28.

Adding to 20933205013 its reverse (31050233902), we get a palindrome (51983438915).

The spelling of 20933205013 in words is "twenty billion, nine hundred thirty-three million, two hundred five thousand, thirteen".