20501430002513 has 4 divisors (see below), whose sum is σ = 20501708035380. Its totient is φ = 20501151969648.

The previous prime is 20501430002429. The next prime is 20501430002531. The reversal of 20501430002513 is 31520003410502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11737153958209 + 8764276044304 = 3425953^2 + 2960452^2 .

It is a cyclic number.

It is not a de Polignac number, because 20501430002513 - 2¹⁴ = 20501429986129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20501430002533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138905798 + ... + 139053311.

It is an arithmetic number, because the mean of its divisors is an integer number (5125427008845).

Almost surely, 2^{20501430002513} is an apocalyptic number.

It is an amenable number.

20501430002513 is a deficient number, since it is larger than the sum of its proper divisors (278032867).

20501430002513 is an equidigital number, since it uses as much as digits as its factorization.

20501430002513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278032866.

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 20501430002513 in words is "twenty trillion, five hundred one billion, four hundred thirty million, two thousand, five hundred thirteen".