2123656700 has 72 divisors (see below), whose sum is σ = 5245914240. Its totient is φ = 738654400.

The previous prime is 2123656693. The next prime is 2123656709. The reversal of 2123656700 is 76563212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123656709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16670 + ... + 67269.

It is an arithmetic number, because the mean of its divisors is an integer number (72859920).

Almost surely, 2^2123656700 is an apocalyptic number.

2123656700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123656700 is an abundant number, since it is smaller than the sum of its proper divisors (3122257540).

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

2123656700 is a wasteful number, since it uses less digits than its factorization.

2123656700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83987 (or 83980 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 2123656700 is about 46083.1498489415. The cubic root of 2123656700 is about 1285.3698360646.

The spelling of 2123656700 in words is "two billion, one hundred twenty-three million, six hundred fifty-six thousand, seven hundred".