20940337766 has 16 divisors (see below), whose sum is σ = 32198569200. Its totient is φ = 10210704768.

The previous prime is 20940337739. The next prime is 20940337771. The reversal of 20940337766 is 66773304902.

It is a self number, because there is not a number n which added to its sum of digits gives 20940337766.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792776 + ... + 818763.

It is an arithmetic number, because the mean of its divisors is an integer number (2012410575).

Almost surely, 2^20940337766 is an apocalyptic number.

20940337766 is a deficient number, since it is larger than the sum of its proper divisors (11258231434).

20940337766 is a wasteful number, since it uses less digits than its factorization.

20940337766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611703.

The product of its (nonzero) digits is 1143072, while the sum is 47.

The spelling of 20940337766 in words is "twenty billion, nine hundred forty million, three hundred thirty-seven thousand, seven hundred sixty-six".