20351026523409 has 32 divisors (see below), whose sum is σ = 27363311982720. Its totient is φ = 13453276741632.

The previous prime is 20351026523393. The next prime is 20351026523419. The reversal of 20351026523409 is 90432562015302.

It is not a de Polignac number, because 20351026523409 - 2⁴ = 20351026523393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20351026523419) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1528651537 + ... + 1528664849.

It is an arithmetic number, because the mean of its divisors is an integer number (855103499460).

Almost surely, 2^{20351026523409} is an apocalyptic number.

It is an amenable number.

20351026523409 is a deficient number, since it is larger than the sum of its proper divisors (7012285459311).

20351026523409 is a wasteful number, since it uses less digits than its factorization.

20351026523409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17329.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 20351026523409 in words is "twenty trillion, three hundred fifty-one billion, twenty-six million, five hundred twenty-three thousand, four hundred nine".