20401107007513 has 16 divisors (see below), whose sum is σ = 22431153736656. Its totient is φ = 18476111093760.

The previous prime is 20401107007487. The next prime is 20401107007517. The reversal of 20401107007513 is 31570070110402.

It can be written as a sum of positive squares in 8 ways, for example, as 656832444304 + 19744274563209 = 810452^2 + 4443453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20401107007513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20401107007517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200427756 + ... + 200529517.

It is an arithmetic number, because the mean of its divisors is an integer number (1401947108541).

Almost surely, 2^{20401107007513} is an apocalyptic number.

It is an amenable number.

20401107007513 is a deficient number, since it is larger than the sum of its proper divisors (2030046729143).

20401107007513 is a wasteful number, since it uses less digits than its factorization.

20401107007513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400957404.

The product of its (nonzero) digits is 5880, while the sum is 31.

Adding to 20401107007513 its reverse (31570070110402), we get a palindrome (51971177117915).

The spelling of 20401107007513 in words is "twenty trillion, four hundred one billion, one hundred seven million, seven thousand, five hundred thirteen".