18290740628 has 12 divisors (see below), whose sum is σ = 32009781300. Its totient is φ = 9145088832.

The previous prime is 18290740613. The next prime is 18290740667. The reversal of 18290740628 is 82604709281.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3262922884 + 15027817744 = 57122^2 + 122588^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158648 + ... + 248496.

It is an arithmetic number, because the mean of its divisors is an integer number (2667481775).

Almost surely, 2^18290740628 is an apocalyptic number.

It is an amenable number.

18290740628 is a deficient number, since it is larger than the sum of its proper divisors (13719040672).

18290740628 is a wasteful number, since it uses less digits than its factorization.

18290740628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140746 (or 140744 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 18290740628 in words is "eighteen billion, two hundred ninety million, seven hundred forty thousand, six hundred twenty-eight".