2154700680 has 128 divisors (see below), whose sum is σ = 7131369600. Its totient is φ = 516454400.

The previous prime is 2154700679. The next prime is 2154700703. The reversal of 2154700680 is 860074512.

It is a Harshad number since it is a multiple of its sum of digits (33).

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 31 ways as a sum of consecutive naturals, for example, 108310 + ... + 126650.

It is an arithmetic number, because the mean of its divisors is an integer number (55713825).

Almost surely, 2^2154700680 is an apocalyptic number.

2154700680 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 2154700680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3565684800).

2154700680 is an abundant number, since it is smaller than the sum of its proper divisors (4976668920).

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

2154700680 is a wasteful number, since it uses less digits than its factorization.

2154700680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18455 (or 18451 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 2154700680 is about 46418.7535377675. The cubic root of 2154700680 is about 1291.6028150932.

The spelling of 2154700680 in words is "two billion, one hundred fifty-four million, seven hundred thousand, six hundred eighty".