20443001020157 has 2 divisors, whose sum is σ = 20443001020158. Its totient is φ = 20443001020156.

The previous prime is 20443001020121. The next prime is 20443001020171. The reversal of 20443001020157 is 75102010034402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20191191758521 + 251809261636 = 4493461^2 + 501806^2 .

It is a cyclic number.

It is not a de Polignac number, because 20443001020157 - 2³² = 20438706052861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20443001020457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221500510078 + 10221500510079.

It is an arithmetic number, because the mean of its divisors is an integer number (10221500510079).

Almost surely, 2^{20443001020157} is an apocalyptic number.

It is an amenable number.

20443001020157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20443001020157 is an equidigital number, since it uses as much as digits as its factorization.

20443001020157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 20443001020157 its reverse (75102010034402), we get a palindrome (95545011054559).

The spelling of 20443001020157 in words is "twenty trillion, four hundred forty-three billion, one million, twenty thousand, one hundred fifty-seven".