20276831 has 2 divisors, whose sum is σ = 20276832. Its totient is φ = 20276830.

The previous prime is 20276807. The next prime is 20276843. The reversal of 20276831 is 13867202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20276831 - 2¹⁰ = 20275807 is a prime.

It is a super-2 number, since 2×20276831² = 822299750805122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20276794 and 20276803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20276131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10138415 + 10138416.

It is an arithmetic number, because the mean of its divisors is an integer number (10138416).

Almost surely, 2^20276831 is an apocalyptic number.

20276831 is a deficient number, since it is larger than the sum of its proper divisors (1).

20276831 is an equidigital number, since it uses as much as digits as its factorization.

20276831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20276831 is about 4502.9802353552. The cubic root of 20276831 is about 272.6884189128.

The spelling of 20276831 in words is "twenty million, two hundred seventy-six thousand, eight hundred thirty-one".