21546131046147 has 16 divisors (see below), whose sum is σ = 31921332955680. Its totient is φ = 14363574898176.

The previous prime is 21546131046113. The next prime is 21546131046263. The reversal of 21546131046147 is 74164013164512.

21546131046147 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 6 + 13 + 10 + 4 + 614 + 7 = 666.

It is not a de Polignac number, because 21546131046147 - 2⁷ = 21546131046019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21546131046547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13463598 + ... + 14978675.

It is an arithmetic number, because the mean of its divisors is an integer number (1995083309730).

Almost surely, 2^{21546131046147} is an apocalyptic number.

21546131046147 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

21546131046147 is a deficient number, since it is larger than the sum of its proper divisors (10375201909533).

21546131046147 is a wasteful number, since it uses less digits than its factorization.

21546131046147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28470339 (or 28470333 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 21546131046147 in words is "twenty-one trillion, five hundred forty-six billion, one hundred thirty-one million, forty-six thousand, one hundred forty-seven".