1906020243 has 12 divisors (see below), whose sum is σ = 2755011168. Its totient is φ = 1269816720.

The previous prime is 1906020241. The next prime is 1906020251. The reversal of 1906020243 is 3420206091.

1906020243 is a `hidden beast` number, since 19 + 0 + 602 + 0 + 2 + 43 = 666.

It is not a de Polignac number, because 1906020243 - 2¹ = 1906020241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1906020241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57828 + ... + 84593.

It is an arithmetic number, because the mean of its divisors is an integer number (229584264).

Almost surely, 2^1906020243 is an apocalyptic number.

1906020243 is a deficient number, since it is larger than the sum of its proper divisors (848990925).

1906020243 is a wasteful number, since it uses less digits than its factorization.

1906020243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143914 (or 143911 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1906020243 is about 43657.9917426352. The cubic root of 1906020243 is about 1239.8690988683.

The spelling of 1906020243 in words is "one billion, nine hundred six million, twenty thousand, two hundred forty-three".