20642282867 has 2 divisors, whose sum is σ = 20642282868. Its totient is φ = 20642282866.

The previous prime is 20642282863. The next prime is 20642282873. The reversal of 20642282867 is 76828224602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20642282867 - 2² = 20642282863 is a prime.

It is a super-2 number, since 2×20642282867² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20642282863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10321141433 + 10321141434.

It is an arithmetic number, because the mean of its divisors is an integer number (10321141434).

Almost surely, 2^20642282867 is an apocalyptic number.

20642282867 is a deficient number, since it is larger than the sum of its proper divisors (1).

20642282867 is an equidigital number, since it uses as much as digits as its factorization.

20642282867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1032192, while the sum is 47.

The spelling of 20642282867 in words is "twenty billion, six hundred forty-two million, two hundred eighty-two thousand, eight hundred sixty-seven".