18937935540 has 192 divisors, whose sum is σ = 61061817600. Its totient is φ = 4867011072.

The previous prime is 18937935529. The next prime is 18937935563. The reversal of 18937935540 is 4553973981.

18937935540 is a `hidden beast` number, since 1 + 8 + 9 + 3 + 7 + 93 + 5 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14829382 + ... + 14830658.

It is an arithmetic number, because the mean of its divisors is an integer number (318030300).

Almost surely, 2^18937935540 is an apocalyptic number.

18937935540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18937935540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30530908800).

18937935540 is an abundant number, since it is smaller than the sum of its proper divisors (42123882060).

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

18937935540 is a wasteful number, since it uses less digits than its factorization.

18937935540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271 (or 2263 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 18937935540 in words is "eighteen billion, nine hundred thirty-seven million, nine hundred thirty-five thousand, five hundred forty".