20651514901 has 2 divisors, whose sum is σ = 20651514902. Its totient is φ = 20651514900.

The previous prime is 20651514883. The next prime is 20651514907. The reversal of 20651514901 is 10941515602.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19682687025 + 968827876 = 140295^2 + 31126^2 .

It is a cyclic number.

It is not a de Polignac number, because 20651514901 - 2¹¹ = 20651512853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20651514907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10325757450 + 10325757451.

It is an arithmetic number, because the mean of its divisors is an integer number (10325757451).

Almost surely, 2^20651514901 is an apocalyptic number.

It is an amenable number.

20651514901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20651514901 is an equidigital number, since it uses as much as digits as its factorization.

20651514901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 20651514901 in words is "twenty billion, six hundred fifty-one million, five hundred fourteen thousand, nine hundred one".