20854295808099 has 16 divisors (see below), whose sum is σ = 29950103522304. Its totient is φ = 12831066957600.

The previous prime is 20854295808097. The next prime is 20854295808173. The reversal of 20854295808099 is 99080859245802.

It is not a de Polignac number, because 20854295808099 - 2¹ = 20854295808097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20854295808097) 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, 48655717 + ... + 49082454.

It is an arithmetic number, because the mean of its divisors is an integer number (1871881470144).

Almost surely, 2^{20854295808099} is an apocalyptic number.

20854295808099 is a deficient number, since it is larger than the sum of its proper divisors (9095807714205).

20854295808099 is a wasteful number, since it uses less digits than its factorization.

20854295808099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97743658.

The product of its (nonzero) digits is 149299200, while the sum is 69.

The spelling of 20854295808099 in words is "twenty trillion, eight hundred fifty-four billion, two hundred ninety-five million, eight hundred eight thousand, ninety-nine".