20543363240723 has 16 divisors (see below), whose sum is σ = 21705243840000. Its totient is φ = 19411766707872.

The previous prime is 20543363240677. The next prime is 20543363240773. The reversal of 20543363240723 is 32704236334502.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20543363240723 - 2⁸ = 20543363240467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20543363240773) 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, 22309448 + ... + 23212026.

It is an arithmetic number, because the mean of its divisors is an integer number (1356577740000).

Almost surely, 2^{20543363240723} is an apocalyptic number.

20543363240723 is a deficient number, since it is larger than the sum of its proper divisors (1161880599277).

20543363240723 is a wasteful number, since it uses less digits than its factorization.

20543363240723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919354.

The product of its (nonzero) digits is 2177280, while the sum is 44.

The spelling of 20543363240723 in words is "twenty trillion, five hundred forty-three billion, three hundred sixty-three million, two hundred forty thousand, seven hundred twenty-three".