1002023118 has 12 divisors (see below), whose sum is σ = 2171050128. Its totient is φ = 334007700.

The previous prime is 1002023101. The next prime is 1002023119. The reversal of 1002023118 is 8113202001.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 55667951 = 1002023118 / (1 + 0 + 0 + 2 + 0 + 2 + 3 + 1 + 1 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 1002023118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002023119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27833958 + ... + 27833993.

It is an arithmetic number, because the mean of its divisors is an integer number (180920844).

Almost surely, 2^1002023118 is an apocalyptic number.

1002023118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1002023118 is an abundant number, since it is smaller than the sum of its proper divisors (1169027010).

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

1002023118 is a wasteful number, since it uses less digits than its factorization.

1002023118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55667959 (or 55667956 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1002023118 is about 31654.7487432771. The cubic root of 1002023118 is about 1000.6739183986.

Adding to 1002023118 its reverse (8113202001), we get a palindrome (9115225119).

The spelling of 1002023118 in words is "one billion, two million, twenty-three thousand, one hundred eighteen".