20835802919929 has 4 divisors (see below), whose sum is σ = 20836036147600. Its totient is φ = 20835569692260.

The previous prime is 20835802919927. The next prime is 20835802919933. The reversal of 20835802919929 is 92991920853802.

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.

It is a cyclic number.

It is not a de Polignac number, because 20835802919929 - 2¹ = 20835802919927 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20835802919923) 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, 116479779 + ... + 116658520.

It is an arithmetic number, because the mean of its divisors is an integer number (5209009036900).

Almost surely, 2^{20835802919929} is an apocalyptic number.

It is an amenable number.

20835802919929 is a deficient number, since it is larger than the sum of its proper divisors (233227671).

20835802919929 is an equidigital number, since it uses as much as digits as its factorization.

20835802919929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233227670.

The product of its (nonzero) digits is 50388480, while the sum is 67.

The spelling of 20835802919929 in words is "twenty trillion, eight hundred thirty-five billion, eight hundred two million, nine hundred nineteen thousand, nine hundred twenty-nine".