20225431679 has 2 divisors, whose sum is σ = 20225431680. Its totient is φ = 20225431678.

The previous prime is 20225431621. The next prime is 20225431697. The reversal of 20225431679 is 97613452202.

Together with next prime (20225431697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20225431679 - 2¹⁶ = 20225366143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20225431279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112715839 + 10112715840.

It is an arithmetic number, because the mean of its divisors is an integer number (10112715840).

Almost surely, 2^20225431679 is an apocalyptic number.

20225431679 is a deficient number, since it is larger than the sum of its proper divisors (1).

20225431679 is an equidigital number, since it uses as much as digits as its factorization.

20225431679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 20225431679 in words is "twenty billion, two hundred twenty-five million, four hundred thirty-one thousand, six hundred seventy-nine".