20869420816 has 20 divisors (see below), whose sum is σ = 40526622400. Its totient is φ = 10410937632.

The previous prime is 20869420807. The next prime is 20869420861. The reversal of 20869420816 is 61802496802.

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, 1478556 + ... + 1492603.

It is an arithmetic number, because the mean of its divisors is an integer number (2026331120).

Almost surely, 2^20869420816 is an apocalyptic number.

It is an amenable number.

20869420816 is a deficient number, since it is larger than the sum of its proper divisors (19657201584).

20869420816 is a wasteful number, since it uses less digits than its factorization.

20869420816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2971606 (or 2971600 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 20869420816 in words is "twenty billion, eight hundred sixty-nine million, four hundred twenty thousand, eight hundred sixteen".