20430673723 has 16 divisors (see below), whose sum is σ = 21576119040. Its totient is φ = 19292364000.

The previous prime is 20430673699. The next prime is 20430673759. The reversal of 20430673723 is 32737603402.

It is a cyclic number.

It is not a de Polignac number, because 20430673723 - 2¹³ = 20430665531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20430673793) 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, 13520538 + ... + 13522048.

It is an arithmetic number, because the mean of its divisors is an integer number (1348507440).

Almost surely, 2^20430673723 is an apocalyptic number.

20430673723 is a deficient number, since it is larger than the sum of its proper divisors (1145445317).

20430673723 is a wasteful number, since it uses less digits than its factorization.

20430673723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378.

The product of its (nonzero) digits is 127008, while the sum is 37.

The spelling of 20430673723 in words is "twenty billion, four hundred thirty million, six hundred seventy-three thousand, seven hundred twenty-three".