2045410821 has 12 divisors (see below), whose sum is σ = 3010227948. Its totient is φ = 1337878464.

The previous prime is 2045410793. The next prime is 2045410831. The reversal of 2045410821 is 1280145402.

It can be written as a sum of positive squares in 2 ways, for example, as 1830641796 + 214769025 = 42786^2 + 14655^2 .

It is not a de Polignac number, because 2045410821 - 2⁵ = 2045410789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045410831) 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, 2143560 + ... + 2144513.

It is an arithmetic number, because the mean of its divisors is an integer number (250852329).

Almost surely, 2^2045410821 is an apocalyptic number.

It is an amenable number.

2045410821 is a deficient number, since it is larger than the sum of its proper divisors (964817127).

2045410821 is a wasteful number, since it uses less digits than its factorization.

2045410821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4288132 (or 4288129 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 2045410821 is about 45226.2182920483. The cubic root of 2045410821 is about 1269.3854511146.

The spelling of 2045410821 in words is "two billion, forty-five million, four hundred ten thousand, eight hundred twenty-one".