18211454040 has 128 divisors (see below), whose sum is σ = 59377348800. Its totient is φ = 4441651200.

The previous prime is 18211454033. The next prime is 18211454059. The reversal of 18211454040 is 4045411281.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 18211453989 and 18211454007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116490 + ... + 223590.

Almost surely, 2^18211454040 is an apocalyptic number.

18211454040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18211454040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29688674400).

18211454040 is an abundant number, since it is smaller than the sum of its proper divisors (41165894760).

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

18211454040 is a wasteful number, since it uses less digits than its factorization.

18211454040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107237 (or 107233 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The spelling of 18211454040 in words is "eighteen billion, two hundred eleven million, four hundred fifty-four thousand, forty".