20351645106215 has 16 divisors (see below), whose sum is σ = 24448981467456. Its totient is φ = 16263312691200.

The previous prime is 20351645106193. The next prime is 20351645106229. The reversal of 20351645106215 is 51260154615302.

It is not a de Polignac number, because 20351645106215 - 2⁶ = 20351645106151 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 127628135 + ... + 127787495.

It is an arithmetic number, because the mean of its divisors is an integer number (1528061341716).

Almost surely, 2^{20351645106215} is an apocalyptic number.

20351645106215 is a deficient number, since it is larger than the sum of its proper divisors (4097336361241).

20351645106215 is a wasteful number, since it uses less digits than its factorization.

20351645106215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187450.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 20351645106215 in words is "twenty trillion, three hundred fifty-one billion, six hundred forty-five million, one hundred six thousand, two hundred fifteen".