2120831700 has 216 divisors, whose sum is σ = 6766754400. Its totient is φ = 512478720.

The previous prime is 2120831663. The next prime is 2120831701. The reversal of 2120831700 is 71380212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120831701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2990946 + ... + 2991654.

Almost surely, 2^2120831700 is an apocalyptic number.

2120831700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2120831700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3383377200).

2120831700 is an abundant number, since it is smaller than the sum of its proper divisors (4645922700).

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

2120831700 is a wasteful number, since it uses less digits than its factorization.

2120831700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 791 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 2120831700 is about 46052.4885321087. The cubic root of 2120831700 is about 1284.7996275963.

The spelling of 2120831700 in words is "two billion, one hundred twenty million, eight hundred thirty-one thousand, seven hundred".