20968962777 has 16 divisors (see below), whose sum is σ = 35503006080. Its totient is φ = 11982264336.

The previous prime is 20968962769. The next prime is 20968962779. The reversal of 20968962777 is 77726986902.

It is not a de Polignac number, because 20968962777 - 2³ = 20968962769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (20968962779) 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, 55473258 + ... + 55473635.

It is an arithmetic number, because the mean of its divisors is an integer number (2218937880).

Almost surely, 2^20968962777 is an apocalyptic number.

20968962777 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20968962777 is a deficient number, since it is larger than the sum of its proper divisors (14534043303).

20968962777 is a wasteful number, since it uses less digits than its factorization.

20968962777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110946909 (or 110946903 counting only the distinct ones).

The product of its (nonzero) digits is 32006016, while the sum is 63.

The spelling of 20968962777 in words is "twenty billion, nine hundred sixty-eight million, nine hundred sixty-two thousand, seven hundred seventy-seven".