20005102547631 has 12 divisors (see below), whose sum is σ = 28896557186952. Its totient is φ = 13336597515696.

The previous prime is 20005102547611. The next prime is 20005102547659. The reversal of 20005102547631 is 13674520150002.

20005102547631 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 5 + 10 + 2 + 5 + 4 + 7 + 631 = 666.

It is not a de Polignac number, because 20005102547631 - 2⁶ = 20005102547567 is a prime.

It is a super-2 number, since 2×20005102547631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005102547611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10534401 + ... + 12287546.

It is an arithmetic number, because the mean of its divisors is an integer number (2408046432246).

Almost surely, 2^{20005102547631} is an apocalyptic number.

20005102547631 is a deficient number, since it is larger than the sum of its proper divisors (8891454639321).

20005102547631 is a wasteful number, since it uses less digits than its factorization.

20005102547631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22919350 (or 22919347 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

Adding to 20005102547631 its reverse (13674520150002), we get a palindrome (33679622697633).

The spelling of 20005102547631 in words is "twenty trillion, five billion, one hundred two million, five hundred forty-seven thousand, six hundred thirty-one".