1851852020 has 24 divisors (see below), whose sum is σ = 3890793984. Its totient is φ = 740378016.

The previous prime is 1851852019. The next prime is 1851852089. The reversal of 1851852020 is 202581581.

It is a happy number.

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, 21257 + ... + 64463.

It is an arithmetic number, because the mean of its divisors is an integer number (162116416).

Almost surely, 2^1851852020 is an apocalyptic number.

1851852020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1851852020 is an abundant number, since it is smaller than the sum of its proper divisors (2038941964).

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

1851852020 is a wasteful number, since it uses less digits than its factorization.

1851852020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45359 (or 45357 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 1851852020 is about 43033.1502448984. The cubic root of 1851852020 is about 1228.0105367146.

The spelling of 1851852020 in words is "one billion, eight hundred fifty-one million, eight hundred fifty-two thousand, twenty".