20276969 has 2 divisors, whose sum is σ = 20276970. Its totient is φ = 20276968.

The previous prime is 20276923. The next prime is 20276989. The reversal of 20276969 is 96967202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13579225 + 6697744 = 3685^2 + 2588^2 .

It is a cyclic number.

It is not a de Polignac number, because 20276969 - 2²⁰ = 19228393 is a prime.

It is a super-2 number, since 2×20276969² = 822310943653922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20276989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10138484 + 10138485.

It is an arithmetic number, because the mean of its divisors is an integer number (10138485).

Almost surely, 2^20276969 is an apocalyptic number.

It is an amenable number.

20276969 is a deficient number, since it is larger than the sum of its proper divisors (1).

20276969 is an equidigital number, since it uses as much as digits as its factorization.

20276969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 20276969 is about 4502.9955585144. The cubic root of 20276969 is about 272.6890375321.

The spelling of 20276969 in words is "twenty million, two hundred seventy-six thousand, nine hundred sixty-nine".