2045351021 has 16 divisors (see below), whose sum is σ = 2377401600. Its totient is φ = 1723507200.

The previous prime is 2045351003. The next prime is 2045351027. The reversal of 2045351021 is 1201535402.

It is a cyclic number.

It is not a de Polignac number, because 2045351021 - 2¹⁴ = 2045334637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045351027) 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, 92555 + ... + 112503.

It is an arithmetic number, because the mean of its divisors is an integer number (148587600).

Almost surely, 2^2045351021 is an apocalyptic number.

It is an amenable number.

2045351021 is a deficient number, since it is larger than the sum of its proper divisors (332050579).

2045351021 is a wasteful number, since it uses less digits than its factorization.

2045351021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20204.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2045351021 is about 45225.5571662749. The cubic root of 2045351021 is about 1269.3730803333.

Adding to 2045351021 its reverse (1201535402), we get a palindrome (3246886423).

The spelling of 2045351021 in words is "two billion, forty-five million, three hundred fifty-one thousand, twenty-one".