20151553189 has 2 divisors, whose sum is σ = 20151553190. Its totient is φ = 20151553188.

The previous prime is 20151553139. The next prime is 20151553307. The reversal of 20151553189 is 98135515102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17462301025 + 2689252164 = 132145^2 + 51858^2 .

It is a cyclic number.

It is not a de Polignac number, because 20151553189 - 2⁹ = 20151552677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20151553139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10075776594 + 10075776595.

It is an arithmetic number, because the mean of its divisors is an integer number (10075776595).

Almost surely, 2^20151553189 is an apocalyptic number.

It is an amenable number.

20151553189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20151553189 is an equidigital number, since it uses as much as digits as its factorization.

20151553189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 40.

The spelling of 20151553189 in words is "twenty billion, one hundred fifty-one million, five hundred fifty-three thousand, one hundred eighty-nine".