20276455847 has 4 divisors (see below), whose sum is σ = 20281527696. Its totient is φ = 20271384000.

The previous prime is 20276455807. The next prime is 20276455861. The reversal of 20276455847 is 74855467202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74855467202 = 2 ⋅37427733601.

It is a cyclic number.

It is not a de Polignac number, because 20276455847 - 2²⁸ = 20008020391 is a prime.

It is a super-2 number, since 2×20276455847² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20276455795 and 20276455804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20276455807) 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, 2529923 + ... + 2537924.

It is an arithmetic number, because the mean of its divisors is an integer number (5070381924).

Almost surely, 2^20276455847 is an apocalyptic number.

20276455847 is a deficient number, since it is larger than the sum of its proper divisors (5071849).

20276455847 is an equidigital number, since it uses as much as digits as its factorization.

20276455847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071848.

The product of its (nonzero) digits is 3763200, while the sum is 50.

The spelling of 20276455847 in words is "twenty billion, two hundred seventy-six million, four hundred fifty-five thousand, eight hundred forty-seven".