1815102396 has 18 divisors (see below), whose sum is σ = 4588175592. Its totient is φ = 605034120.

The previous prime is 1815102343. The next prime is 1815102403. The reversal of 1815102396 is 6932015181.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 50419511 = 1815102396 / (1 + 8 + 1 + 5 + 1 + 0 + 2 + 3 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 1815102396.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25209720 + ... + 25209791.

It is an arithmetic number, because the mean of its divisors is an integer number (254898644).

Almost surely, 2^1815102396 is an apocalyptic number.

It is an amenable number.

1815102396 is an abundant number, since it is smaller than the sum of its proper divisors (2773073196).

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

1815102396 is a wasteful number, since it uses less digits than its factorization.

1815102396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50419521 (or 50419516 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1815102396 is about 42604.0185428558. The cubic root of 1815102396 is about 1219.8329960419.

The spelling of 1815102396 in words is "one billion, eight hundred fifteen million, one hundred two thousand, three hundred ninety-six".