20004520635 has 48 divisors (see below), whose sum is σ = 37950232320. Its totient is φ = 9667494720.

The previous prime is 20004520583. The next prime is 20004520637. The reversal of 20004520635 is 53602540002.

20004520635 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 4 + 5 + 20 + 635 = 666.

It is not a de Polignac number, because 20004520635 - 2²² = 20000326331 is a prime.

It is a super-2 number, since 2×20004520635² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20004520599 and 20004520608.

It is not an unprimeable number, because it can be changed into a prime (20004520637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 86146 + ... + 217784.

It is an arithmetic number, because the mean of its divisors is an integer number (790629840).

Almost surely, 2^20004520635 is an apocalyptic number.

20004520635 is a deficient number, since it is larger than the sum of its proper divisors (17945711685).

20004520635 is a wasteful number, since it uses less digits than its factorization.

20004520635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131968 (or 131965 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The spelling of 20004520635 in words is "twenty billion, four million, five hundred twenty thousand, six hundred thirty-five".