18007200123 has 16 divisors (see below), whose sum is σ = 26831129472. Its totient is φ = 10647272000.

The previous prime is 18007200121. The next prime is 18007200137. The reversal of 18007200123 is 32100270081.

It is a cyclic number.

It is not a de Polignac number, because 18007200123 - 2¹ = 18007200121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18007200093 and 18007200102.

It is not an unprimeable number, because it can be changed into a prime (18007200121) 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, 6653193 + ... + 6655898.

It is an arithmetic number, because the mean of its divisors is an integer number (1676945592).

Almost surely, 2^18007200123 is an apocalyptic number.

18007200123 is a deficient number, since it is larger than the sum of its proper divisors (8823929349).

18007200123 is a wasteful number, since it uses less digits than its factorization.

18007200123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13309146.

The product of its (nonzero) digits is 672, while the sum is 24.

It can be divided in two parts, 18007 and 200123, that added together give a triangular number (218130 = T₆₆₀).

The spelling of 18007200123 in words is "eighteen billion, seven million, two hundred thousand, one hundred twenty-three".