20534064647426 has 16 divisors (see below), whose sum is σ = 33601266773568. Its totient is φ = 9333646282800.

The previous prime is 20534064647423. The next prime is 20534064647429. The reversal of 20534064647426 is 62474646043502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20534064647423) and next prime (20534064647429).

It is not an unprimeable number, because it can be changed into a prime (20534064647423) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 18268496 + ... + 19359908.

It is an arithmetic number, because the mean of its divisors is an integer number (2100079173348).

Almost surely, 2^{20534064647426} is an apocalyptic number.

20534064647426 is a deficient number, since it is larger than the sum of its proper divisors (13067202126142).

20534064647426 is a wasteful number, since it uses less digits than its factorization.

20534064647426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946617.

The product of its (nonzero) digits is 23224320, while the sum is 53.

The spelling of 20534064647426 in words is "twenty trillion, five hundred thirty-four billion, sixty-four million, six hundred forty-seven thousand, four hundred twenty-six".