18850129240 has 32 divisors (see below), whose sum is σ = 42418440000. Its totient is φ = 7539047424.

The previous prime is 18850129237. The next prime is 18850129241. The reversal of 18850129240 is 4292105881.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 18850129193 and 18850129202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18850129241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321736 + ... + 375784.

It is an arithmetic number, because the mean of its divisors is an integer number (1325576250).

Almost surely, 2^18850129240 is an apocalyptic number.

18850129240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18850129240 is an abundant number, since it is smaller than the sum of its proper divisors (23568310760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18850129240 is a wasteful number, since it uses less digits than its factorization.

18850129240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62779 (or 62775 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 40.

The spelling of 18850129240 in words is "eighteen billion, eight hundred fifty million, one hundred twenty-nine thousand, two hundred forty".