2146321780 has 24 divisors (see below), whose sum is σ = 4612097952. Its totient is φ = 838562592.

The previous prime is 2146321777. The next prime is 2146321831. The reversal of 2146321780 is 871236412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1247002 + ... + 1248721.

It is an arithmetic number, because the mean of its divisors is an integer number (192170748).

Almost surely, 2^2146321780 is an apocalyptic number.

2146321780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2146321780 is an abundant number, since it is smaller than the sum of its proper divisors (2465776172).

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

2146321780 is a wasteful number, since it uses less digits than its factorization.

2146321780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495775 (or 2495773 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 2146321780 is about 46328.4122326678. The cubic root of 2146321780 is about 1289.9264385271.

The spelling of 2146321780 in words is "two billion, one hundred forty-six million, three hundred twenty-one thousand, seven hundred eighty".