20402855659862 has 16 divisors (see below), whose sum is σ = 32980713397632. Its totient is φ = 9410344253760.

The previous prime is 20402855659831. The next prime is 20402855659867. The reversal of 20402855659862 is 26895655820402.

It is a junction number, because it is equal to n+sod(n) for n = 20402855659795 and 20402855659804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402855659867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264892358 + ... + 264969369.

It is an arithmetic number, because the mean of its divisors is an integer number (2061294587352).

Almost surely, 2^{20402855659862} is an apocalyptic number.

20402855659862 is a deficient number, since it is larger than the sum of its proper divisors (12577857737770).

20402855659862 is a wasteful number, since it uses less digits than its factorization.

20402855659862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529863223.

The product of its (nonzero) digits is 82944000, while the sum is 62.

The spelling of 20402855659862 in words is "twenty trillion, four hundred two billion, eight hundred fifty-five million, six hundred fifty-nine thousand, eight hundred sixty-two".