20995071999 has 16 divisors (see below), whose sum is σ = 30588625920. Its totient is φ = 12703311360.

The previous prime is 20995071983. The next prime is 20995072001. The reversal of 20995071999 is 99917059902.

It is not a de Polignac number, because 20995071999 - 2⁴ = 20995071983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20995072999) 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, 504034 + ... + 544095.

It is an arithmetic number, because the mean of its divisors is an integer number (1911789120).

Almost surely, 2^20995071999 is an apocalyptic number.

20995071999 is a deficient number, since it is larger than the sum of its proper divisors (9593553921).

20995071999 is a wasteful number, since it uses less digits than its factorization.

20995071999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048750.

The product of its (nonzero) digits is 4133430, while the sum is 60.

The spelling of 20995071999 in words is "twenty billion, nine hundred ninety-five million, seventy-one thousand, nine hundred ninety-nine".