18157300490 has 64 divisors (see below), whose sum is σ = 38944972800. Its totient is φ = 5963279616.

The previous prime is 18157300489. The next prime is 18157300493. The reversal of 18157300490 is 9400375181.

It is a super-2 number, since 2×18157300490² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18157300493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222596 + ... + 293024.

It is an arithmetic number, because the mean of its divisors is an integer number (608515200).

Almost surely, 2^18157300490 is an apocalyptic number.

18157300490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18157300490 is an abundant number, since it is smaller than the sum of its proper divisors (20787672310).

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

18157300490 is a wasteful number, since it uses less digits than its factorization.

18157300490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70599.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 18157300490 in words is "eighteen billion, one hundred fifty-seven million, three hundred thousand, four hundred ninety".