20733246507513 has 4 divisors (see below), whose sum is σ = 27644328676688. Its totient is φ = 13822164338340.

The previous prime is 20733246507509. The next prime is 20733246507553. The reversal of 20733246507513 is 31570564233702.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20733246507513 - 2² = 20733246507509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20733246507553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3455541084583 + ... + 3455541084588.

It is an arithmetic number, because the mean of its divisors is an integer number (6911082169172).

Almost surely, 2^{20733246507513} is an apocalyptic number.

It is an amenable number.

20733246507513 is a deficient number, since it is larger than the sum of its proper divisors (6911082169175).

20733246507513 is an equidigital number, since it uses as much as digits as its factorization.

20733246507513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6911082169174.

The product of its (nonzero) digits is 3175200, while the sum is 48.

The spelling of 20733246507513 in words is "twenty trillion, seven hundred thirty-three billion, two hundred forty-six million, five hundred seven thousand, five hundred thirteen".