2187993418 has 16 divisors (see below), whose sum is σ = 3535740936. Its totient is φ = 1009474560.

The previous prime is 2187993403. The next prime is 2187993443. The reversal of 2187993418 is 8143997812.

It can be written as a sum of positive squares in 4 ways, for example, as 1462068169 + 725925249 = 38237^2 + 26943^2 .

It is a super-2 number, since 2×2187993418² = 9574630394422645448, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65230 + ... + 92902.

Almost surely, 2^2187993418 is an apocalyptic number.

2187993418 is a deficient number, since it is larger than the sum of its proper divisors (1347747518).

2187993418 is a wasteful number, since it uses less digits than its factorization.

2187993418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30729.

The product of its digits is 870912, while the sum is 52.

The square root of 2187993418 is about 46775.9918975536. The cubic root of 2187993418 is about 1298.2211207939.

The spelling of 2187993418 in words is "two billion, one hundred eighty-seven million, nine hundred ninety-three thousand, four hundred eighteen".