20523010501 has 6 divisors (see below), whose sum is σ = 23873706150. Its totient is φ = 17591151816.

The previous prime is 20523010499. The next prime is 20523010537. The reversal of 20523010501 is 10501032502.

It can be written as a sum of positive squares in only one way, i.e., 20505953601 + 17056900 = 143199^2 + 4130^2 .

It is not a de Polignac number, because 20523010501 - 2¹ = 20523010499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523010591) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209418426 + ... + 209418523.

It is an arithmetic number, because the mean of its divisors is an integer number (3978951025).

Almost surely, 2^20523010501 is an apocalyptic number.

It is an amenable number.

20523010501 is a deficient number, since it is larger than the sum of its proper divisors (3350695649).

20523010501 is an equidigital number, since it uses as much as digits as its factorization.

20523010501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418836963 (or 418836956 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The spelling of 20523010501 in words is "twenty billion, five hundred twenty-three million, ten thousand, five hundred one".