20810696220499 has 4 divisors (see below), whose sum is σ = 20950365322800. Its totient is φ = 20671027118200.

The previous prime is 20810696220497. The next prime is 20810696220547. The reversal of 20810696220499 is 99402269601802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20810696220499 - 2¹ = 20810696220497 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20810696220497) 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, 69834550927 + ... + 69834551224.

It is an arithmetic number, because the mean of its divisors is an integer number (5237591330700).

Almost surely, 2^{20810696220499} is an apocalyptic number.

20810696220499 is a deficient number, since it is larger than the sum of its proper divisors (139669102301).

20810696220499 is a wasteful number, since it uses less digits than its factorization.

20810696220499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139669102300.

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 20810696220499 in words is "twenty trillion, eight hundred ten billion, six hundred ninety-six million, two hundred twenty thousand, four hundred ninety-nine".