2154734670 has 128 divisors (see below), whose sum is σ = 5849874432. Its totient is φ = 503222400.

The previous prime is 2154734651. The next prime is 2154734671. The reversal of 2154734670 is 764374512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154734671) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 3549507 + ... + 3550113.

It is an arithmetic number, because the mean of its divisors is an integer number (45702144).

Almost surely, 2^2154734670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154734670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2924937216).

2154734670 is an abundant number, since it is smaller than the sum of its proper divisors (3695139762).

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

2154734670 is a wasteful number, since it uses less digits than its factorization.

2154734670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006.

The product of its (nonzero) digits is 141120, while the sum is 39.

The square root of 2154734670 is about 46419.1196598988. The cubic root of 2154734670 is about 1291.6096066550.

The spelling of 2154734670 in words is "two billion, one hundred fifty-four million, seven hundred thirty-four thousand, six hundred seventy".