18639654027540 has 192 divisors, whose sum is σ = 64237614465024. Its totient is φ = 3932609167872.

The previous prime is 18639654027469. The next prime is 18639654027601. The reversal of 18639654027540 is 4572045693681.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 190215637 + ... + 190313603.

It is an arithmetic number, because the mean of its divisors is an integer number (334570908672).

It is a 1-persistent number, because it is pandigital, but 2⋅18639654027540 = 37279308055080 is not.

Almost surely, 2^{18639654027540} is an apocalyptic number.

18639654027540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18639654027540 is an abundant number, since it is smaller than the sum of its proper divisors (45597960437484).

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

18639654027540 is a wasteful number, since it uses less digits than its factorization.

18639654027540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132846 (or 132844 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 60.

The spelling of 18639654027540 in words is "eighteen trillion, six hundred thirty-nine billion, six hundred fifty-four million, twenty-seven thousand, five hundred forty".