18103722 has 64 divisors (see below), whose sum is σ = 45287424. Its totient is φ = 4697280.

The previous prime is 18103717. The next prime is 18103727. The reversal of 18103722 is 22730181.

It is an interprime number because it is at equal distance from previous prime (18103717) and next prime (18103727).

It is a junction number, because it is equal to n+sod(n) for n = 18103692 and 18103701.

It is not an unprimeable number, because it can be changed into a prime (18103727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38533 + ... + 38999.

It is an arithmetic number, because the mean of its divisors is an integer number (707616).

Almost surely, 2^18103722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18103722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22643712).

18103722 is an abundant number, since it is smaller than the sum of its proper divisors (27183702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18103722 is a wasteful number, since it uses less digits than its factorization.

18103722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563.

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

The square root of 18103722 is about 4254.8468832615. The cubic root of 18103722 is about 262.5765617945.

It can be divided in two parts, 18 and 103722, that added together give a triangular number (103740 = T₄₅₅).

The spelling of 18103722 in words is "eighteen million, one hundred three thousand, seven hundred twenty-two".