20415653099551 has 2 divisors, whose sum is σ = 20415653099552. Its totient is φ = 20415653099550.

The previous prime is 20415653099531. The next prime is 20415653099573. The reversal of 20415653099551 is 15599035651402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20415653099551 - 2⁷ = 20415653099423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20415653099492 and 20415653099501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20415653099521) 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, 10207826549775 + 10207826549776.

It is an arithmetic number, because the mean of its divisors is an integer number (10207826549776).

Almost surely, 2^{20415653099551} is an apocalyptic number.

20415653099551 is a deficient number, since it is larger than the sum of its proper divisors (1).

20415653099551 is an equidigital number, since it uses as much as digits as its factorization.

20415653099551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290000, while the sum is 55.

The spelling of 20415653099551 in words is "twenty trillion, four hundred fifteen billion, six hundred fifty-three million, ninety-nine thousand, five hundred fifty-one".