20654349723 has 48 divisors (see below), whose sum is σ = 34638489600. Its totient is φ = 11616177600.

The previous prime is 20654349671. The next prime is 20654349731. The reversal of 20654349723 is 32794345602.

20654349723 is a `hidden beast` number, since 206 + 5 + 434 + 9 + 7 + 2 + 3 = 666.

It is not a de Polignac number, because 20654349723 - 2⁸ = 20654349467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20654349763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1026958 + ... + 1046876.

It is an arithmetic number, because the mean of its divisors is an integer number (721635200).

Almost surely, 2^20654349723 is an apocalyptic number.

20654349723 is a deficient number, since it is larger than the sum of its proper divisors (13984139877).

20654349723 is a wasteful number, since it uses less digits than its factorization.

20654349723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20192 (or 20189 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

The spelling of 20654349723 in words is "twenty billion, six hundred fifty-four million, three hundred forty-nine thousand, seven hundred twenty-three".