18054691280 has 40 divisors (see below), whose sum is σ = 41998223400. Its totient is φ = 7218252288.

The previous prime is 18054691253. The next prime is 18054691289. The reversal of 18054691280 is 8219645081.

It can be written as a sum of positive squares in 4 ways, for example, as 7227040144 + 10827651136 = 85012^2 + 104056^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×18054691280² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18054691289) 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, 106706 + ... + 217934.

It is an arithmetic number, because the mean of its divisors is an integer number (1049955585).

Almost surely, 2^18054691280 is an apocalyptic number.

18054691280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18054691280 is an abundant number, since it is smaller than the sum of its proper divisors (23943532120).

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

18054691280 is a wasteful number, since it uses less digits than its factorization.

18054691280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113271 (or 113265 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The spelling of 18054691280 in words is "eighteen billion, fifty-four million, six hundred ninety-one thousand, two hundred eighty".