20543489678462 has 4 divisors (see below), whose sum is σ = 30815234517696. Its totient is φ = 10271744839230.

The previous prime is 20543489678441. The next prime is 20543489678501. The reversal of 20543489678462 is 26487698434502.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 20543489678392 and 20543489678401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5135872419614 + ... + 5135872419617.

It is an arithmetic number, because the mean of its divisors is an integer number (7703808629424).

Almost surely, 2^{20543489678462} is an apocalyptic number.

20543489678462 is a deficient number, since it is larger than the sum of its proper divisors (10271744839234).

20543489678462 is a wasteful number, since it uses less digits than its factorization.

20543489678462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10271744839233.

The product of its (nonzero) digits is 557383680, while the sum is 68.

The spelling of 20543489678462 in words is "twenty trillion, five hundred forty-three billion, four hundred eighty-nine million, six hundred seventy-eight thousand, four hundred sixty-two".