20953861462767 has 4 divisors (see below), whose sum is σ = 27938481950360. Its totient is φ = 13969240975176.

The previous prime is 20953861462763. The next prime is 20953861462783. The reversal of 20953861462767 is 76726416835902.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20953861462767 - 2² = 20953861462763 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20953861462698 and 20953861462707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20953861462763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3492310243792 + ... + 3492310243797.

It is an arithmetic number, because the mean of its divisors is an integer number (6984620487590).

It is a 1-persistent number, because it is pandigital, but 2⋅20953861462767 = 41907722925534 is not.

Almost surely, 2^{20953861462767} is an apocalyptic number.

20953861462767 is a deficient number, since it is larger than the sum of its proper divisors (6984620487593).

20953861462767 is an equidigital number, since it uses as much as digits as its factorization.

20953861462767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6984620487592.

The product of its (nonzero) digits is 182891520, while the sum is 66.

The spelling of 20953861462767 in words is "twenty trillion, nine hundred fifty-three billion, eight hundred sixty-one million, four hundred sixty-two thousand, seven hundred sixty-seven".