20402411636 has 12 divisors (see below), whose sum is σ = 36575055300. Its totient is φ = 9952395840.

The previous prime is 20402411629. The next prime is 20402411683. The reversal of 20402411636 is 63611420402.

It can be written as a sum of positive squares in 2 ways, for example, as 709902736 + 19692508900 = 26644^2 + 140330^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20402411599 and 20402411608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62202311 + ... + 62202638.

It is an arithmetic number, because the mean of its divisors is an integer number (3047921275).

Almost surely, 2^20402411636 is an apocalyptic number.

It is an amenable number.

20402411636 is a deficient number, since it is larger than the sum of its proper divisors (16172643664).

20402411636 is a wasteful number, since it uses less digits than its factorization.

20402411636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124404994 (or 124404992 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 20402411636 in words is "twenty billion, four hundred two million, four hundred eleven thousand, six hundred thirty-six".