5185381820 has 48 divisors (see below), whose sum is σ = 11536082208. Its totient is φ = 1951088640.

The previous prime is 5185381819. The next prime is 5185381841. The reversal of 5185381820 is 281835815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 950300 + ... + 955740.

It is an arithmetic number, because the mean of its divisors is an integer number (240335046).

Almost surely, 2^5185381820 is an apocalyptic number.

It is an amenable number.

5185381820 is an abundant number, since it is smaller than the sum of its proper divisors (6350700388).

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

5185381820 is a wasteful number, since it uses less digits than its factorization.

5185381820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8270 (or 8268 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 41.

The square root of 5185381820 is about 72009.5953328444. The cubic root of 5185381820 is about 1730.8532461168.

The spelling of 5185381820 in words is "five billion, one hundred eighty-five million, three hundred eighty-one thousand, eight hundred twenty".