2145046020 has 72 divisors (see below), whose sum is σ = 6503708736. Its totient is φ = 528008832.

The previous prime is 2145045953. The next prime is 2145046027. The reversal of 2145046020 is 206405412.

It is not an unprimeable number, because it can be changed into a prime (2145046027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95632 + ... + 115911.

It is an arithmetic number, because the mean of its divisors is an integer number (90329288).

Almost surely, 2^2145046020 is an apocalyptic number.

2145046020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145046020 is an abundant number, since it is smaller than the sum of its proper divisors (4358662716).

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

2145046020 is a wasteful number, since it uses less digits than its factorization.

2145046020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211581 (or 211566 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2145046020 is about 46314.6415294343. The cubic root of 2145046020 is about 1289.6708131857.

The spelling of 2145046020 in words is "two billion, one hundred forty-five million, forty-six thousand, twenty".