38201381818 has 16 divisors (see below), whose sum is σ = 57631127400. Its totient is φ = 18991302400.

The previous prime is 38201381807. The next prime is 38201381843. The reversal of 38201381818 is 81818310283.

It can be written as a sum of positive squares in 4 ways, for example, as 19518045849 + 18683335969 = 139707^2 + 136687^2 .

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, 185358 + ... + 332806.

Almost surely, 2^38201381818 is an apocalyptic number.

38201381818 is a deficient number, since it is larger than the sum of its proper divisors (19429745582).

38201381818 is a wasteful number, since it uses less digits than its factorization.

38201381818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148193.

The product of its (nonzero) digits is 73728, while the sum is 43.

The spelling of 38201381818 in words is "thirty-eight billion, two hundred one million, three hundred eighty-one thousand, eight hundred eighteen".