1020154235447 has 2 divisors, whose sum is σ = 1020154235448. Its totient is φ = 1020154235446.

The previous prime is 1020154235437. The next prime is 1020154235449. The reversal of 1020154235447 is 7445324510201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020154235447 - 2²⁸ = 1019885799991 is a prime.

It is a super-2 number, since 2×1020154235447² (a number of 25 digits) contains 22 as substring.

Together with 1020154235449, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020154235447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020154235449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510077117723 + 510077117724.

It is an arithmetic number, because the mean of its divisors is an integer number (510077117724).

Almost surely, 2^{1020154235447} is an apocalyptic number.

1020154235447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020154235447 is an equidigital number, since it uses as much as digits as its factorization.

1020154235447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 134400, while the sum is 38.

Adding to 1020154235447 its reverse (7445324510201), we get a palindrome (8465478745648).

The spelling of 1020154235447 in words is "one trillion, twenty billion, one hundred fifty-four million, two hundred thirty-five thousand, four hundred forty-seven".