2145421896 has 64 divisors (see below), whose sum is σ = 5742964800. Its totient is φ = 665499648.

The previous prime is 2145421849. The next prime is 2145421903. The reversal of 2145421896 is 6981245412.

It is a super-2 number, since 2×2145421896² = 9205670223672469632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6771 + ... + 65853.

It is an arithmetic number, because the mean of its divisors is an integer number (89733825).

Almost surely, 2^2145421896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2145421896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2871482400).

2145421896 is an abundant number, since it is smaller than the sum of its proper divisors (3597542904).

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

2145421896 is a wasteful number, since it uses less digits than its factorization.

2145421896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59198 (or 59194 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 2145421896 is about 46318.6992045329. The cubic root of 2145421896 is about 1289.7461383754.

The spelling of 2145421896 in words is "two billion, one hundred forty-five million, four hundred twenty-one thousand, eight hundred ninety-six".