1818691960 has 32 divisors (see below), whose sum is σ = 4332767760. Its totient is φ = 684683776.

The previous prime is 1818691937. The next prime is 1818691967. The reversal of 1818691960 is 691968181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818691967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1336594 + ... + 1337953.

Almost surely, 2^1818691960 is an apocalyptic number.

1818691960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1818691960 is an abundant number, since it is smaller than the sum of its proper divisors (2514075800).

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

1818691960 is a wasteful number, since it uses less digits than its factorization.

1818691960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2674575 (or 2674571 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 49.

The square root of 1818691960 is about 42646.1247946399. The cubic root of 1818691960 is about 1220.6365843780.

The spelling of 1818691960 in words is "one billion, eight hundred eighteen million, six hundred ninety-one thousand, nine hundred sixty".