20000123011 has 8 divisors (see below), whose sum is σ = 21842924544. Its totient is φ = 18161422920.

The previous prime is 20000122993. The next prime is 20000123021. The reversal of 20000123011 is 11032100002.

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

It is a cyclic number.

It is not a de Polignac number, because 20000123011 - 2¹³ = 20000114819 is a prime.

It is a super-2 number, since 2×20000123011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20000123021) by changing a digit.

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, 1015155 + ... + 1034668.

It is an arithmetic number, because the mean of its divisors is an integer number (2730365568).

Almost surely, 2^20000123011 is an apocalyptic number.

20000123011 is a deficient number, since it is larger than the sum of its proper divisors (1842801533).

20000123011 is a wasteful number, since it uses less digits than its factorization.

20000123011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050721.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20000123011 its reverse (11032100002), we get a palindrome (31032223013).

The spelling of 20000123011 in words is "twenty billion, one hundred twenty-three thousand, eleven".