20155340046551 has 2 divisors, whose sum is σ = 20155340046552. Its totient is φ = 20155340046550.

The previous prime is 20155340046529. The next prime is 20155340046563. The reversal of 20155340046551 is 15564004355102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20155340046551 - 2²² = 20155335852247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20155340046499 and 20155340046508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20155340046571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10077670023275 + 10077670023276.

It is an arithmetic number, because the mean of its divisors is an integer number (10077670023276).

Almost surely, 2^{20155340046551} is an apocalyptic number.

20155340046551 is a deficient number, since it is larger than the sum of its proper divisors (1).

20155340046551 is an equidigital number, since it uses as much as digits as its factorization.

20155340046551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 20155340046551 in words is "twenty trillion, one hundred fifty-five billion, three hundred forty million, forty-six thousand, five hundred fifty-one".