1866700020 has 48 divisors (see below), whose sum is σ = 5228834688. Its totient is φ = 497589120.

The previous prime is 1866700007. The next prime is 1866700021. The reversal of 1866700020 is 200076681.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866700021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207210 + ... + 216030.

It is an arithmetic number, because the mean of its divisors is an integer number (108934056).

Almost surely, 2^1866700020 is an apocalyptic number.

1866700020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1866700020 is an abundant number, since it is smaller than the sum of its proper divisors (3362134668).

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

1866700020 is a wasteful number, since it uses less digits than its factorization.

1866700020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12360 (or 12358 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 1866700020 is about 43205.3239774915. The cubic root of 1866700020 is about 1231.2838336791.

The spelling of 1866700020 in words is "one billion, eight hundred sixty-six million, seven hundred thousand, twenty".