20535451446513 has 128 divisors (see below), whose sum is σ = 30649751193600. Its totient is φ = 12175015329792.

The previous prime is 20535451446463. The next prime is 20535451446563. The reversal of 20535451446513 is 31564415453502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20535451446463) and next prime (20535451446563).

It is not a de Polignac number, because 20535451446513 - 2⁹ = 20535451446001 is a prime.

It is a super-2 number, since 2×20535451446513² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20535451446563) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 24074385795 + ... + 24074386647.

It is an arithmetic number, because the mean of its divisors is an integer number (239451181200).

Almost surely, 2^{20535451446513} is an apocalyptic number.

It is an amenable number.

20535451446513 is a deficient number, since it is larger than the sum of its proper divisors (10114299747087).

20535451446513 is a wasteful number, since it uses less digits than its factorization.

20535451446513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111.

The product of its (nonzero) digits is 4320000, while the sum is 48.

The spelling of 20535451446513 in words is "twenty trillion, five hundred thirty-five billion, four hundred fifty-one million, four hundred forty-six thousand, five hundred thirteen".