20011969156 has 24 divisors (see below), whose sum is σ = 35193509120. Its totient is φ = 9956721312.

The previous prime is 20011969151. The next prime is 20011969157. The reversal of 20011969156 is 65196911002.

It is not an unprimeable number, because it can be changed into a prime (20011969151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3133975 + ... + 3140353.

Almost surely, 2^20011969156 is an apocalyptic number.

It is an amenable number.

20011969156 is a deficient number, since it is larger than the sum of its proper divisors (15181539964).

20011969156 is a wasteful number, since it uses less digits than its factorization.

20011969156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10123 (or 10121 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 40.

The spelling of 20011969156 in words is "twenty billion, eleven million, nine hundred sixty-nine thousand, one hundred fifty-six".