20973609414479 has 2 divisors, whose sum is σ = 20973609414480. Its totient is φ = 20973609414478.

The previous prime is 20973609414469. The next prime is 20973609414497. The reversal of 20973609414479 is 97441490637902.

Together with next prime (20973609414497) 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 20973609414479 - 2¹⁶ = 20973609348943 is a prime.

It is a super-2 number, since 2×20973609414479² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20973609414419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10486804707239 + 10486804707240.

It is an arithmetic number, because the mean of its divisors is an integer number (10486804707240).

Almost surely, 2^{20973609414479} is an apocalyptic number.

20973609414479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20973609414479 is an equidigital number, since it uses as much as digits as its factorization.

20973609414479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82301184, while the sum is 65.

The spelling of 20973609414479 in words is "twenty trillion, nine hundred seventy-three billion, six hundred nine million, four hundred fourteen thousand, four hundred seventy-nine".