20023459811949 has 16 divisors (see below), whose sum is σ = 29160165222720. Its totient is φ = 12120791535360.

The previous prime is 20023459811933. The next prime is 20023459812019. The reversal of 20023459811949 is 94911895432002.

It is a happy number.

It is not a de Polignac number, because 20023459811949 - 2⁴ = 20023459811933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023459813949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365938572 + ... + 365993285.

It is an arithmetic number, because the mean of its divisors is an integer number (1822510326420).

Almost surely, 2^{20023459811949} is an apocalyptic number.

It is an amenable number.

20023459811949 is a deficient number, since it is larger than the sum of its proper divisors (9136705410771).

20023459811949 is a wasteful number, since it uses less digits than its factorization.

20023459811949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731932700.

The product of its (nonzero) digits is 5598720, while the sum is 57.

The spelling of 20023459811949 in words is "twenty trillion, twenty-three billion, four hundred fifty-nine million, eight hundred eleven thousand, nine hundred forty-nine".