18402020382 has 16 divisors (see below), whose sum is σ = 36808198272. Its totient is φ = 6133313880.

The previous prime is 18402020369. The next prime is 18402020423. The reversal of 18402020382 is 28302020481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114138 + ... + 223229.

It is an arithmetic number, because the mean of its divisors is an integer number (2300512392).

Almost surely, 2^18402020382 is an apocalyptic number.

18402020382 is an abundant number, since it is smaller than the sum of its proper divisors (18406177890).

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

18402020382 is a wasteful number, since it uses less digits than its factorization.

18402020382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346463.

The product of its (nonzero) digits is 6144, while the sum is 30.

Subtracting 18402020382 from its reverse (28302020481), we obtain a palindrome (9900000099).

It can be divided in two parts, 184020 and 20382, that added together give a palindrome (204402).

The spelling of 18402020382 in words is "eighteen billion, four hundred two million, twenty thousand, three hundred eighty-two".