2154720084 has 36 divisors (see below), whose sum is σ = 5526296832. Its totient is φ = 652945040.

The previous prime is 2154720079. The next prime is 2154720091. The reversal of 2154720084 is 4800274512.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 740532 + ... + 743435.

Almost surely, 2^2154720084 is an apocalyptic number.

It is an amenable number.

2154720084 is an abundant number, since it is smaller than the sum of its proper divisors (3371576748).

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

2154720084 is a wasteful number, since it uses less digits than its factorization.

2154720084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483996 (or 1483983 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 2154720084 is about 46418.9625476486. The cubic root of 2154720084 is about 1291.6066922265.

Adding to 2154720084 its reverse (4800274512), we get a palindrome (6954994596).

The spelling of 2154720084 in words is "two billion, one hundred fifty-four million, seven hundred twenty thousand, eighty-four".