20039597781311 has 16 divisors (see below), whose sum is σ = 21146671067904. Its totient is φ = 18952858450944.

The previous prime is 20039597781283. The next prime is 20039597781323. The reversal of 20039597781311 is 11318779593002.

It is a cyclic number.

It is not a de Polignac number, because 20039597781311 - 2¹⁸ = 20039597519167 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 (20039597781391) 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, 6497666 + ... + 9071871.

It is an arithmetic number, because the mean of its divisors is an integer number (1321666941744).

Almost surely, 2^{20039597781311} is an apocalyptic number.

20039597781311 is a deficient number, since it is larger than the sum of its proper divisors (1107073286593).

20039597781311 is a wasteful number, since it uses less digits than its factorization.

20039597781311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15570190.

The product of its (nonzero) digits is 2857680, while the sum is 56.

The spelling of 20039597781311 in words is "twenty trillion, thirty-nine billion, five hundred ninety-seven million, seven hundred eighty-one thousand, three hundred eleven".