2020153123657 has 2 divisors, whose sum is σ = 2020153123658. Its totient is φ = 2020153123656.

The previous prime is 2020153123649. The next prime is 2020153123691. The reversal of 2020153123657 is 7563213510202.

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., 1718330344201 + 301822779456 = 1310851^2 + 549384^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020153123657 - 2³ = 2020153123649 is a prime.

It is a super-2 number, since 2×2020153123657² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2020153123697) 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, 1010076561828 + 1010076561829.

It is an arithmetic number, because the mean of its divisors is an integer number (1010076561829).

Almost surely, 2^{2020153123657} is an apocalyptic number.

It is an amenable number.

2020153123657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020153123657 is an equidigital number, since it uses as much as digits as its factorization.

2020153123657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 37.

Adding to 2020153123657 its reverse (7563213510202), we get a palindrome (9583366633859).

The spelling of 2020153123657 in words is "two trillion, twenty billion, one hundred fifty-three million, one hundred twenty-three thousand, six hundred fifty-seven".