20711272978 has 8 divisors (see below), whose sum is σ = 33891174000. Its totient is φ = 9414214980.

The previous prime is 20711272957. The next prime is 20711272987. The reversal of 20711272978 is 87927211702.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 470710728 + ... + 470710771.

It is an arithmetic number, because the mean of its divisors is an integer number (4236396750).

Almost surely, 2^20711272978 is an apocalyptic number.

20711272978 is a deficient number, since it is larger than the sum of its proper divisors (13179901022).

20711272978 is a wasteful number, since it uses less digits than its factorization.

20711272978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941421512.

The product of its (nonzero) digits is 197568, while the sum is 46.

The spelling of 20711272978 in words is "twenty billion, seven hundred eleven million, two hundred seventy-two thousand, nine hundred seventy-eight".