2145326420 has 12 divisors (see below), whose sum is σ = 4505185524. Its totient is φ = 858130560.

The previous prime is 2145326413. The next prime is 2145326471. The reversal of 2145326420 is 246235412.

It can be written as a sum of positive squares in 2 ways, for example, as 1532565904 + 612760516 = 39148^2 + 24754^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53633141 + ... + 53633180.

It is an arithmetic number, because the mean of its divisors is an integer number (375432127).

Almost surely, 2^2145326420 is an apocalyptic number.

2145326420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145326420 is an abundant number, since it is smaller than the sum of its proper divisors (2359859104).

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

2145326420 is a wasteful number, since it uses less digits than its factorization.

2145326420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107266330 (or 107266328 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 2145326420 is about 46317.6685509968. The cubic root of 2145326420 is about 1289.7270059102.

The spelling of 2145326420 in words is "two billion, one hundred forty-five million, three hundred twenty-six thousand, four hundred twenty".