20077981834 has 32 divisors (see below), whose sum is σ = 32566665600. Its totient is φ = 9252552960.

The previous prime is 20077981811. The next prime is 20077981849. The reversal of 20077981834 is 43818977002.

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 15 ways as a sum of consecutive naturals, for example, 541374 + ... + 577270.

It is an arithmetic number, because the mean of its divisors is an integer number (1017708300).

Almost surely, 2^20077981834 is an apocalyptic number.

20077981834 is a deficient number, since it is larger than the sum of its proper divisors (12488683766).

20077981834 is a wasteful number, since it uses less digits than its factorization.

20077981834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36318.

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 20077981834 in words is "twenty billion, seventy-seven million, nine hundred eighty-one thousand, eight hundred thirty-four".