20543671654 has 8 divisors (see below), whose sum is σ = 33616917288. Its totient is φ = 9338032560.

The previous prime is 20543671649. The next prime is 20543671721. The reversal of 20543671654 is 45617634502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20543671654.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466901607 + ... + 466901650.

It is an arithmetic number, because the mean of its divisors is an integer number (4202114661).

Almost surely, 2^20543671654 is an apocalyptic number.

20543671654 is a deficient number, since it is larger than the sum of its proper divisors (13073245634).

20543671654 is a wasteful number, since it uses less digits than its factorization.

20543671654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933803270.

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 20543671654 in words is "twenty billion, five hundred forty-three million, six hundred seventy-one thousand, six hundred fifty-four".