2018729450 has 24 divisors (see below), whose sum is σ = 3762408000. Its totient is φ = 805863600.

The previous prime is 2018729441. The next prime is 2018729459. The reversal of 2018729450 is 549278102.

It is an interprime number because it is at equal distance from previous prime (2018729441) and next prime (2018729459).

It is not an unprimeable number, because it can be changed into a prime (2018729459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15506 + ... + 65405.

It is an arithmetic number, because the mean of its divisors is an integer number (156767000).

Almost surely, 2^2018729450 is an apocalyptic number.

2018729450 is a deficient number, since it is larger than the sum of its proper divisors (1743678550).

2018729450 is a wasteful number, since it uses less digits than its factorization.

2018729450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81422 (or 81417 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 2018729450 is about 44930.2732019292. The cubic root of 2018729450 is about 1263.8417744615.

The spelling of 2018729450 in words is "two billion, eighteen million, seven hundred twenty-nine thousand, four hundred fifty".