20212330157 has 2 divisors, whose sum is σ = 20212330158. Its totient is φ = 20212330156.

The previous prime is 20212330109. The next prime is 20212330211. The reversal of 20212330157 is 75103321202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18299055076 + 1913275081 = 135274^2 + 43741^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20212330157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212332157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106165078 + 10106165079.

It is an arithmetic number, because the mean of its divisors is an integer number (10106165079).

Almost surely, 2^20212330157 is an apocalyptic number.

It is an amenable number.

20212330157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212330157 is an equidigital number, since it uses as much as digits as its factorization.

20212330157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

Adding to 20212330157 its reverse (75103321202), we get a palindrome (95315651359).

The spelling of 20212330157 in words is "twenty billion, two hundred twelve million, three hundred thirty thousand, one hundred fifty-seven".