18103639723701 has 8 divisors (see below), whose sum is σ = 27586498626624. Its totient is φ = 10344936984960.

The previous prime is 18103639723679. The next prime is 18103639723831. The reversal of 18103639723701 is 10732793630181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18103639723701 - 2²¹ = 18103637626549 is a prime.

It is a super-2 number, since 2×18103639723701² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18103639723201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431039041020 + ... + 431039041061.

It is an arithmetic number, because the mean of its divisors is an integer number (3448312328328).

Almost surely, 2^{18103639723701} is an apocalyptic number.

It is an amenable number.

18103639723701 is a deficient number, since it is larger than the sum of its proper divisors (9482858902923).

18103639723701 is an equidigital number, since it uses as much as digits as its factorization.

18103639723701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862078082091.

The product of its (nonzero) digits is 1143072, while the sum is 51.

The spelling of 18103639723701 in words is "eighteen trillion, one hundred three billion, six hundred thirty-nine million, seven hundred twenty-three thousand, seven hundred one".