1820111960 has 16 divisors (see below), whose sum is σ = 4095252000. Its totient is φ = 728044768.

The previous prime is 1820111957. The next prime is 1820111963. The reversal of 1820111960 is 691110281.

It is an interprime number because it is at equal distance from previous prime (1820111957) and next prime (1820111963).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820111963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22751360 + ... + 22751439.

It is an arithmetic number, because the mean of its divisors is an integer number (255953250).

Almost surely, 2^1820111960 is an apocalyptic number.

1820111960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1820111960 is an abundant number, since it is smaller than the sum of its proper divisors (2275140040).

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

1820111960 is a wasteful number, since it uses less digits than its factorization.

1820111960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45502810 (or 45502806 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 29.

The square root of 1820111960 is about 42662.7701866628. The cubic root of 1820111960 is about 1220.9541849894.

The spelling of 1820111960 in words is "one billion, eight hundred twenty million, one hundred eleven thousand, nine hundred sixty".