2157724018 has 8 divisors (see below), whose sum is σ = 3406932720. Its totient is φ = 1022079780.

The previous prime is 2157724007. The next prime is 2157724067. The reversal of 2157724018 is 8104277512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28391068 + ... + 28391143.

It is an arithmetic number, because the mean of its divisors is an integer number (425866590).

Almost surely, 2^2157724018 is an apocalyptic number.

2157724018 is a deficient number, since it is larger than the sum of its proper divisors (1249208702).

2157724018 is a wasteful number, since it uses less digits than its factorization.

2157724018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56782232.

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 2157724018 is about 46451.3080332513. The cubic root of 2157724018 is about 1292.2066308865.

The spelling of 2157724018 in words is "two billion, one hundred fifty-seven million, seven hundred twenty-four thousand, eighteen".