20820363441251 has 16 divisors (see below), whose sum is σ = 23088088879488. Its totient is φ = 18616013644800.

The previous prime is 20820363441197. The next prime is 20820363441257. The reversal of 20820363441251 is 15214436302802.

It is not a de Polignac number, because 20820363441251 - 2³⁰ = 20819289699427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20820363441199 and 20820363441208.

It is not an unprimeable number, because it can be changed into a prime (20820363441257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21563585 + ... + 22508418.

It is an arithmetic number, because the mean of its divisors is an integer number (1443005554968).

Almost surely, 2^{20820363441251} is an apocalyptic number.

20820363441251 is a deficient number, since it is larger than the sum of its proper divisors (2267725438237).

20820363441251 is a wasteful number, since it uses less digits than its factorization.

20820363441251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44072722.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 20820363441251 in words is "twenty trillion, eight hundred twenty billion, three hundred sixty-three million, four hundred forty-one thousand, two hundred fifty-one".