20869172992 has 36 divisors (see below), whose sum is σ = 41674748080. Its totient is φ = 10430097408.

The previous prime is 20869172983. The next prime is 20869173001. The reversal of 20869172992 is 29927196802.

It is an interprime number because it is at equal distance from previous prime (20869172983) and next prime (20869173001).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624484 + ... + 657052.

Almost surely, 2^20869172992 is an apocalyptic number.

It is an amenable number.

20869172992 is a deficient number, since it is larger than the sum of its proper divisors (20805575088).

20869172992 is an equidigital number, since it uses as much as digits as its factorization.

20869172992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35088 (or 35074 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 20869172992 in words is "twenty billion, eight hundred sixty-nine million, one hundred seventy-two thousand, nine hundred ninety-two".