20695463731 has 2 divisors, whose sum is σ = 20695463732. Its totient is φ = 20695463730.

The previous prime is 20695463713. The next prime is 20695463753. The reversal of 20695463731 is 13736459602.

Together with previous prime (20695463713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20695463731 - 2¹⁵ = 20695430963 is a prime.

It is a super-2 number, since 2×20695463731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20695403731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10347731865 + 10347731866.

It is an arithmetic number, because the mean of its divisors is an integer number (10347731866).

Almost surely, 2^20695463731 is an apocalyptic number.

20695463731 is a deficient number, since it is larger than the sum of its proper divisors (1).

20695463731 is an equidigital number, since it uses as much as digits as its factorization.

20695463731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 46.

The spelling of 20695463731 in words is "twenty billion, six hundred ninety-five million, four hundred sixty-three thousand, seven hundred thirty-one".