1820087356238 has 16 divisors (see below), whose sum is σ = 2750315586480. Its totient is φ = 903318081600.

The previous prime is 1820087356207. The next prime is 1820087356247. The reversal of 1820087356238 is 8326537800281.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1820087356238.

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, 768248 + ... + 2056788.

It is an arithmetic number, because the mean of its divisors is an integer number (171894724155).

Almost surely, 2^{1820087356238} is an apocalyptic number.

1820087356238 is a deficient number, since it is larger than the sum of its proper divisors (930228230242).

1820087356238 is a wasteful number, since it uses less digits than its factorization.

1820087356238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293763.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 1820087356238 in words is "one trillion, eight hundred twenty billion, eighty-seven million, three hundred fifty-six thousand, two hundred thirty-eight".