20699784001994 has 16 divisors (see below), whose sum is σ = 31058632969728. Its totient is φ = 10346906682432.

The previous prime is 20699784001993. The next prime is 20699784001997. The reversal of 20699784001994 is 49910048799602.

It is not an unprimeable number, because it can be changed into a prime (20699784001993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138918359 + ... + 139067285.

It is an arithmetic number, because the mean of its divisors is an integer number (1941164560608).

Almost surely, 2^{20699784001994} is an apocalyptic number.

20699784001994 is a deficient number, since it is larger than the sum of its proper divisors (10358848967734).

20699784001994 is a wasteful number, since it uses less digits than its factorization.

20699784001994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168509.

The product of its (nonzero) digits is 70543872, while the sum is 68.

The spelling of 20699784001994 in words is "twenty trillion, six hundred ninety-nine billion, seven hundred eighty-four million, one thousand, nine hundred ninety-four".