20120573513 has 2 divisors, whose sum is σ = 20120573514. Its totient is φ = 20120573512.

The previous prime is 20120573387. The next prime is 20120573531. The reversal of 20120573513 is 31537502102.

Together with next prime (20120573531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18667210384 + 1453363129 = 136628^2 + 38123^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120573513 - 2⁸ = 20120573257 is a prime.

It is a super-2 number, since 2×20120573513² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20120573593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060286756 + 10060286757.

It is an arithmetic number, because the mean of its divisors is an integer number (10060286757).

Almost surely, 2^20120573513 is an apocalyptic number.

It is an amenable number.

20120573513 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120573513 is an equidigital number, since it uses as much as digits as its factorization.

20120573513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 29.

The spelling of 20120573513 in words is "twenty billion, one hundred twenty million, five hundred seventy-three thousand, five hundred thirteen".