20203233157 has 2 divisors, whose sum is σ = 20203233158. Its totient is φ = 20203233156.

The previous prime is 20203233067. The next prime is 20203233161. The reversal of 20203233157 is 75133230202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15374512036 + 4828721121 = 123994^2 + 69489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20203233157 is a prime.

It is a super-2 number, since 2×20203233157² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20203233257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101616578 + 10101616579.

It is an arithmetic number, because the mean of its divisors is an integer number (10101616579).

Almost surely, 2^20203233157 is an apocalyptic number.

It is an amenable number.

20203233157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203233157 is an equidigital number, since it uses as much as digits as its factorization.

20203233157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 28.

Adding to 20203233157 its reverse (75133230202), we get a palindrome (95336463359).

The spelling of 20203233157 in words is "twenty billion, two hundred three million, two hundred thirty-three thousand, one hundred fifty-seven".