2126729518 has 24 divisors (see below), whose sum is σ = 3373109784. Its totient is φ = 1005091920.

The previous prime is 2126729509. The next prime is 2126729543. The reversal of 2126729518 is 8159276212.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69780 + ... + 95512.

It is an arithmetic number, because the mean of its divisors is an integer number (140546241).

Almost surely, 2^2126729518 is an apocalyptic number.

2126729518 is a deficient number, since it is larger than the sum of its proper divisors (1246380266).

2126729518 is a wasteful number, since it uses less digits than its factorization.

2126729518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25840 (or 25809 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 2126729518 is about 46116.4777275975. The cubic root of 2126729518 is about 1285.9894911613.

The spelling of 2126729518 in words is "two billion, one hundred twenty-six million, seven hundred twenty-nine thousand, five hundred eighteen".