18518520202 has 64 divisors (see below), whose sum is σ = 36960295680. Its totient is φ = 6752802816.

The previous prime is 18518520199. The next prime is 18518520217. The reversal of 18518520202 is 20202581581.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55578 + ... + 200314.

It is an arithmetic number, because the mean of its divisors is an integer number (577504620).

Almost surely, 2^18518520202 is an apocalyptic number.

18518520202 is a deficient number, since it is larger than the sum of its proper divisors (18441775478).

18518520202 is a wasteful number, since it uses less digits than its factorization.

18518520202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144815.

The product of its (nonzero) digits is 12800, while the sum is 34.

The spelling of 18518520202 in words is "eighteen billion, five hundred eighteen million, five hundred twenty thousand, two hundred two".