20276915825 has 6 divisors (see below), whose sum is σ = 25143375654. Its totient is φ = 16221532640.

The previous prime is 20276915809. The next prime is 20276915873. The reversal of 20276915825 is 52851967202.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 213043216 + 20063872609 = 14596^2 + 141647^2 .

It is not a de Polignac number, because 20276915825 - 2⁴ = 20276915809 is a prime.

It is a super-2 number, since 2×20276915825² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20276915825.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 405538292 + ... + 405538341.

It is an arithmetic number, because the mean of its divisors is an integer number (4190562609).

Almost surely, 2^20276915825 is an apocalyptic number.

20276915825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20276915825 is a deficient number, since it is larger than the sum of its proper divisors (4866459829).

20276915825 is an equidigital number, since it uses as much as digits as its factorization.

20276915825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811076643 (or 811076638 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 20276915825 in words is "twenty billion, two hundred seventy-six million, nine hundred fifteen thousand, eight hundred twenty-five".