2042655021 has 48 divisors (see below), whose sum is σ = 3394659840. Its totient is φ = 1170560160.

The previous prime is 2042655011. The next prime is 2042655023. The reversal of 2042655021 is 1205562402.

2042655021 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 655 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 2042655021 - 2¹⁷ = 2042523949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2042655023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1818366 + ... + 1819488.

It is an arithmetic number, because the mean of its divisors is an integer number (70722080).

Almost surely, 2^2042655021 is an apocalyptic number.

It is an amenable number.

2042655021 is a deficient number, since it is larger than the sum of its proper divisors (1352004819).

2042655021 is a wasteful number, since it uses less digits than its factorization.

2042655021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126 (or 2123 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 2042655021 is about 45195.7411821070. The cubic root of 2042655021 is about 1268.8151101662.

The spelling of 2042655021 in words is "two billion, forty-two million, six hundred fifty-five thousand, twenty-one".