20893659407 has 2 divisors, whose sum is σ = 20893659408. Its totient is φ = 20893659406.

The previous prime is 20893659383. The next prime is 20893659419. The reversal of 20893659407 is 70495639802.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20893659407 - 2⁸ = 20893659151 is a prime.

It is a super-3 number, since 3×20893659407³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20893659467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10446829703 + 10446829704.

It is an arithmetic number, because the mean of its divisors is an integer number (10446829704).

Almost surely, 2^20893659407 is an apocalyptic number.

20893659407 is a deficient number, since it is larger than the sum of its proper divisors (1).

20893659407 is an equidigital number, since it uses as much as digits as its factorization.

20893659407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 20893659407 in words is "twenty billion, eight hundred ninety-three million, six hundred fifty-nine thousand, four hundred seven".