20051345145321 has 24 divisors (see below), whose sum is σ = 33102413170944. Its totient is φ = 11457295387200.

The previous prime is 20051345145257. The next prime is 20051345145371. The reversal of 20051345145321 is 12354154315002.

20051345145321 is a `hidden beast` number, since 2 + 0 + 0 + 5 + 134 + 51 + 453 + 21 = 666.

It is not a de Polignac number, because 20051345145321 - 2⁶ = 20051345145257 is a prime.

It is a super-4 number, since 4×20051345145321⁴ (a number of 54 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (20051345145371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7375105 + ... + 9720846.

It is an arithmetic number, because the mean of its divisors is an integer number (1379267215456).

Almost surely, 2^{20051345145321} is an apocalyptic number.

20051345145321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20051345145321 is a deficient number, since it is larger than the sum of its proper divisors (13051068025623).

20051345145321 is a wasteful number, since it uses less digits than its factorization.

20051345145321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17114581 (or 17114578 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 20051345145321 in words is "twenty trillion, fifty-one billion, three hundred forty-five million, one hundred forty-five thousand, three hundred twenty-one".