1802020845 has 16 divisors (see below), whose sum is σ = 2884492800. Its totient is φ = 960657984.

The previous prime is 1802020799. The next prime is 1802020861. The reversal of 1802020845 is 5480202081.

It is not a de Polignac number, because 1802020845 - 2⁹ = 1802020333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10947 + ... + 61023.

It is an arithmetic number, because the mean of its divisors is an integer number (180280800).

Almost surely, 2^1802020845 is an apocalyptic number.

1802020845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1802020845 is a deficient number, since it is larger than the sum of its proper divisors (1082471955).

1802020845 is a wasteful number, since it uses less digits than its factorization.

1802020845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52484.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 1802020845 is about 42450.2160771886. The cubic root of 1802020845 is about 1216.8954580266.

The spelling of 1802020845 in words is "one billion, eight hundred two million, twenty thousand, eight hundred forty-five".