1840402020 has 24 divisors (see below), whose sum is σ = 5153125824. Its totient is φ = 490773856.

The previous prime is 1840402009. The next prime is 1840402121. The reversal of 1840402020 is 202040481.

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, 15336624 + ... + 15336743.

It is an arithmetic number, because the mean of its divisors is an integer number (214713576).

Almost surely, 2^1840402020 is an apocalyptic number.

1840402020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1840402020 is an abundant number, since it is smaller than the sum of its proper divisors (3312723804).

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

1840402020 is a wasteful number, since it uses less digits than its factorization.

1840402020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30673379 (or 30673377 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1840402020 is about 42899.9069929062. The cubic root of 1840402020 is about 1225.4743729910.

The spelling of 1840402020 in words is "one billion, eight hundred forty million, four hundred two thousand, twenty".