20351633365406 has 16 divisors (see below), whose sum is σ = 35090182057824. Its totient is φ = 8671711655904.

The previous prime is 20351633365391. The next prime is 20351633365417. The reversal of 20351633365406 is 60456333615302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4201408265 + ... + 4201413108.

It is an arithmetic number, because the mean of its divisors is an integer number (2193136378614).

Almost surely, 2^{20351633365406} is an apocalyptic number.

20351633365406 is a deficient number, since it is larger than the sum of its proper divisors (14738548692418).

20351633365406 is a wasteful number, since it uses less digits than its factorization.

20351633365406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8402821555.

The product of its (nonzero) digits is 3499200, while the sum is 47.

The spelling of 20351633365406 in words is "twenty trillion, three hundred fifty-one billion, six hundred thirty-three million, three hundred sixty-five thousand, four hundred six".