20820955346763 has 16 divisors (see below), whose sum is σ = 32614643341056. Its totient is φ = 11648086907040.

The previous prime is 20820955346759. The next prime is 20820955346801. The reversal of 20820955346763 is 36764355902802.

It is not a de Polignac number, because 20820955346763 - 2² = 20820955346759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20820955346697 and 20820955346706.

It is not an unprimeable number, because it can be changed into a prime (20820951346763) 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, 24266847295 + ... + 24266848152.

It is an arithmetic number, because the mean of its divisors is an integer number (2038415208816).

Almost surely, 2^{20820955346763} is an apocalyptic number.

20820955346763 is a deficient number, since it is larger than the sum of its proper divisors (11793687994293).

20820955346763 is a wasteful number, since it uses less digits than its factorization.

20820955346763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48533695474.

The product of its (nonzero) digits is 65318400, while the sum is 60.

The spelling of 20820955346763 in words is "twenty trillion, eight hundred twenty billion, nine hundred fifty-five million, three hundred forty-six thousand, seven hundred sixty-three".