18401419836 has 48 divisors (see below), whose sum is σ = 49781625600. Its totient is φ = 5867118576.

The previous prime is 18401419811. The next prime is 18401419889. The reversal of 18401419836 is 63891410481.

It is a super-2 number, since 2×18401419836² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18401419791 and 18401419800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3701506 + ... + 3706473.

It is an arithmetic number, because the mean of its divisors is an integer number (1037117200).

Almost surely, 2^18401419836 is an apocalyptic number.

It is an amenable number.

18401419836 is an abundant number, since it is smaller than the sum of its proper divisors (31380205764).

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

18401419836 is a wasteful number, since it uses less digits than its factorization.

18401419836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7408015 (or 7408007 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 18401419836 in words is "eighteen billion, four hundred one million, four hundred nineteen thousand, eight hundred thirty-six".