20963209427 has 2 divisors, whose sum is σ = 20963209428. Its totient is φ = 20963209426.

The previous prime is 20963209411. The next prime is 20963209471. The reversal of 20963209427 is 72490236902.

It is an a-pointer prime, because the next prime (20963209471) can be obtained adding 20963209427 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20963209427 - 2⁴ = 20963209411 is a prime.

It is a super-2 number, since 2×20963209427² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20963209327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10481604713 + 10481604714.

It is an arithmetic number, because the mean of its divisors is an integer number (10481604714).

Almost surely, 2^20963209427 is an apocalyptic number.

20963209427 is a deficient number, since it is larger than the sum of its proper divisors (1).

20963209427 is an equidigital number, since it uses as much as digits as its factorization.

20963209427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 20963209427 in words is "twenty billion, nine hundred sixty-three million, two hundred nine thousand, four hundred twenty-seven".