20400666420422 has 16 divisors (see below), whose sum is σ = 31661419014144. Its totient is φ = 9848386965000.

The previous prime is 20400666420419. The next prime is 20400666420439. The reversal of 20400666420422 is 22402466600402.

It is a congruent number.

It is an unprimeable number.

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, 381693704 + ... + 381747147.

It is an arithmetic number, because the mean of its divisors is an integer number (1978838688384).

Almost surely, 2^{20400666420422} is an apocalyptic number.

20400666420422 is a deficient number, since it is larger than the sum of its proper divisors (11260752593722).

20400666420422 is a wasteful number, since it uses less digits than its factorization.

20400666420422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763441315.

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 20400666420422 in words is "twenty trillion, four hundred billion, six hundred sixty-six million, four hundred twenty thousand, four hundred twenty-two".