2051845890 has 32 divisors (see below), whose sum is σ = 4925978496. Its totient is φ = 546986880.

The previous prime is 2051845867. The next prime is 2051845897. The reversal of 2051845890 is 985481502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2051845897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107619 + ... + 125241.

It is an arithmetic number, because the mean of its divisors is an integer number (153936828).

Almost surely, 2^2051845890 is an apocalyptic number.

2051845890 is an abundant number, since it is smaller than the sum of its proper divisors (2874132606).

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

2051845890 is a wasteful number, since it uses less digits than its factorization.

2051845890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21514.

The product of its (nonzero) digits is 115200, while the sum is 42.

The square root of 2051845890 is about 45297.3055490059. The cubic root of 2051845890 is about 1270.7152624541.

The spelling of 2051845890 in words is "two billion, fifty-one million, eight hundred forty-five thousand, eight hundred ninety".