18420651143136 has 144 divisors (see below), whose sum is σ = 57147840994608. Its totient is φ = 5581824307200.

The previous prime is 18420651143131. The next prime is 18420651143149. The reversal of 18420651143136 is 63134115602481.

It is a happy number.

18420651143136 is a `hidden beast` number, since 1 + 8 + 4 + 206 + 5 + 1 + 1 + 431 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 18420651143091 and 18420651143100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18420651143131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112499406 + ... + 112663026.

It is an arithmetic number, because the mean of its divisors is an integer number (396860006907).

Almost surely, 2^{18420651143136} is an apocalyptic number.

18420651143136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18420651143136 is an abundant number, since it is smaller than the sum of its proper divisors (38727189851472).

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

18420651143136 is a wasteful number, since it uses less digits than its factorization.

18420651143136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199185 (or 199174 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 18420651143136 in words is "eighteen trillion, four hundred twenty billion, six hundred fifty-one million, one hundred forty-three thousand, one hundred thirty-six".