20152155553 has 2 divisors, whose sum is σ = 20152155554. Its totient is φ = 20152155552.

The previous prime is 20152155469. The next prime is 20152155577. The reversal of 20152155553 is 35555125102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16636614289 + 3515541264 = 128983^2 + 59292^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20152155553 is a prime.

It is a super-2 number, since 2×20152155553² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20152155253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10076077776 + 10076077777.

It is an arithmetic number, because the mean of its divisors is an integer number (10076077777).

Almost surely, 2^20152155553 is an apocalyptic number.

It is an amenable number.

20152155553 is a deficient number, since it is larger than the sum of its proper divisors (1).

20152155553 is an equidigital number, since it uses as much as digits as its factorization.

20152155553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37500, while the sum is 34.

The spelling of 20152155553 in words is "twenty billion, one hundred fifty-two million, one hundred fifty-five thousand, five hundred fifty-three".