20011969154 has 8 divisors (see below), whose sum is σ = 30355234380. Its totient is φ = 9893557696.

The previous prime is 20011969151. The next prime is 20011969157. The reversal of 20011969154 is 45196911002.

It is an interprime number because it is at equal distance from previous prime (20011969151) and next prime (20011969157).

It can be written as a sum of positive squares in 2 ways, for example, as 17127742129 + 2884227025 = 130873^2 + 53705^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 56213219 + ... + 56213574.

Almost surely, 2^20011969154 is an apocalyptic number.

20011969154 is a deficient number, since it is larger than the sum of its proper divisors (10343265226).

20011969154 is a wasteful number, since it uses less digits than its factorization.

20011969154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112426884.

The product of its (nonzero) digits is 19440, while the sum is 38.

The spelling of 20011969154 in words is "twenty billion, eleven million, nine hundred sixty-nine thousand, one hundred fifty-four".