18070481520 has 480 divisors, whose sum is σ = 74988950400. Its totient is φ = 3797508096.

The previous prime is 18070481519. The next prime is 18070481521. The reversal of 18070481520 is 2518407081.

It is an interprime number because it is at equal distance from previous prime (18070481519) and next prime (18070481521).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18070481521) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 25486926 + ... + 25487634.

It is an arithmetic number, because the mean of its divisors is an integer number (156226980).

Almost surely, 2^18070481520 is an apocalyptic number.

18070481520 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 18070481520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37494475200).

18070481520 is an abundant number, since it is smaller than the sum of its proper divisors (56918468880).

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

18070481520 is a wasteful number, since it uses less digits than its factorization.

18070481520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

It can be divided in two parts, 18070481 and 520, that added together give a square (18071001 = 4251²).

The spelling of 18070481520 in words is "eighteen billion, seventy million, four hundred eighty-one thousand, five hundred twenty".