20651523241 has 2 divisors, whose sum is σ = 20651523242. Its totient is φ = 20651523240.

The previous prime is 20651523157. The next prime is 20651523271. The reversal of 20651523241 is 14232515602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19510502400 + 1141020841 = 139680^2 + 33779^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20651523241 is a prime.

It is not a weakly prime, because it can be changed into another prime (20651523271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10325761620 + 10325761621.

It is an arithmetic number, because the mean of its divisors is an integer number (10325761621).

Almost surely, 2^20651523241 is an apocalyptic number.

It is an amenable number.

20651523241 is a deficient number, since it is larger than the sum of its proper divisors (1).

20651523241 is an equidigital number, since it uses as much as digits as its factorization.

20651523241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 20651523241 in words is "twenty billion, six hundred fifty-one million, five hundred twenty-three thousand, two hundred forty-one".