2168951900 has 36 divisors (see below), whose sum is σ = 4716396048. Its totient is φ = 865779840.

The previous prime is 2168951899. The next prime is 2168951977. The reversal of 2168951900 is 91598612.

It is a happy number.

It is a super-2 number, since 2×2168951900² = 9408704689027220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26432 + ... + 70968.

Almost surely, 2^2168951900 is an apocalyptic number.

2168951900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2168951900 is an abundant number, since it is smaller than the sum of its proper divisors (2547444148).

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

2168951900 is a wasteful number, since it uses less digits than its factorization.

2168951900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45038 (or 45031 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 2168951900 is about 46572.0076870216. The cubic root of 2168951900 is about 1294.4441197350. Note that the first 3 decimals are identical.

The spelling of 2168951900 in words is "two billion, one hundred sixty-eight million, nine hundred fifty-one thousand, nine hundred".