2145914920 has 32 divisors (see below), whose sum is σ = 4889433600. Its totient is φ = 847499328.

The previous prime is 2145914909. The next prime is 2145914923. The reversal of 2145914920 is 294195412.

It is a self number, because there is not a number n which added to its sum of digits gives 2145914920.

It is not an unprimeable number, because it can be changed into a prime (2145914923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336384 + ... + 342703.

It is an arithmetic number, because the mean of its divisors is an integer number (152794800).

Almost surely, 2^2145914920 is an apocalyptic number.

2145914920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145914920 is an abundant number, since it is smaller than the sum of its proper divisors (2743518680).

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

2145914920 is a wasteful number, since it uses less digits than its factorization.

2145914920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679177 (or 679173 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 2145914920 is about 46324.0209826392. The cubic root of 2145914920 is about 1289.8449265747.

The spelling of 2145914920 in words is "two billion, one hundred forty-five million, nine hundred fourteen thousand, nine hundred twenty".