18612129532 has 12 divisors (see below), whose sum is σ = 33264231840. Its totient is φ = 9108063296.

The previous prime is 18612129517. The next prime is 18612129551. The reversal of 18612129532 is 23592121681.

It is a happy number.

It is a super-2 number, since 2×18612129532² (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, 49500157 + ... + 49500532.

It is an arithmetic number, because the mean of its divisors is an integer number (2772019320).

Almost surely, 2^18612129532 is an apocalyptic number.

It is an amenable number.

18612129532 is a deficient number, since it is larger than the sum of its proper divisors (14652102308).

18612129532 is a wasteful number, since it uses less digits than its factorization.

18612129532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99000740 (or 99000738 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The spelling of 18612129532 in words is "eighteen billion, six hundred twelve million, one hundred twenty-nine thousand, five hundred thirty-two".