20977985283 has 16 divisors (see below), whose sum is σ = 28168957440. Its totient is φ = 13886507936.

The previous prime is 20977985213. The next prime is 20977985297. The reversal of 20977985283 is 38258977902.

It is a cyclic number.

It is not a de Polignac number, because 20977985283 - 2⁸ = 20977985027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20977985213) 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, 206641 + ... + 290957.

It is an arithmetic number, because the mean of its divisors is an integer number (1760559840).

Almost surely, 2^20977985283 is an apocalyptic number.

20977985283 is a deficient number, since it is larger than the sum of its proper divisors (7190972157).

20977985283 is a wasteful number, since it uses less digits than its factorization.

20977985283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84906.

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 20977985283 in words is "twenty billion, nine hundred seventy-seven million, nine hundred eighty-five thousand, two hundred eighty-three".