2194521920 has 28 divisors (see below), whose sum is σ = 5225706084. Its totient is φ = 877808640.

The previous prime is 2194521919. The next prime is 2194521937. The reversal of 2194521920 is 291254912.

It can be written as a sum of positive squares in 2 ways, for example, as 546811456 + 1647710464 = 23384^2 + 40592^2 .

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, 3428621 + ... + 3429260.

Almost surely, 2^2194521920 is an apocalyptic number.

2194521920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2194521920 is an abundant number, since it is smaller than the sum of its proper divisors (3031184164).

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

2194521920 is an equidigital number, since it uses as much as digits as its factorization.

2194521920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6857898 (or 6857888 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 2194521920 is about 46845.7246715215. The cubic root of 2194521920 is about 1299.5110429406.

The spelling of 2194521920 in words is "two billion, one hundred ninety-four million, five hundred twenty-one thousand, nine hundred twenty".