18039969652 has 12 divisors (see below), whose sum is σ = 31810939776. Its totient is φ = 8951129720.

The previous prime is 18039969589. The next prime is 18039969763. The reversal of 18039969652 is 25696993081.

It is a super-2 number, since 2×18039969652² (a number of 21 digits) contains 22 as substring.

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, 17213188 + ... + 17214235.

It is an arithmetic number, because the mean of its divisors is an integer number (2650911648).

Almost surely, 2^18039969652 is an apocalyptic number.

It is an amenable number.

18039969652 is a deficient number, since it is larger than the sum of its proper divisors (13770970124).

18039969652 is a wasteful number, since it uses less digits than its factorization.

18039969652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34427558 (or 34427556 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 58.

The spelling of 18039969652 in words is "eighteen billion, thirty-nine million, nine hundred sixty-nine thousand, six hundred fifty-two".