22021615636406 has 16 divisors (see below), whose sum is σ = 33513132376944. Its totient is φ = 10850825654784.

The previous prime is 22021615636313. The next prime is 22021615636429. The reversal of 22021615636406 is 60463651612022.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63362075 + ... + 63708678.

It is an arithmetic number, because the mean of its divisors is an integer number (2094570773559).

Almost surely, 2^{22021615636406} is an apocalyptic number.

22021615636406 is a deficient number, since it is larger than the sum of its proper divisors (11491516740538).

22021615636406 is a wasteful number, since it uses less digits than its factorization.

22021615636406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127072015.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 22021615636406 in words is "twenty-two trillion, twenty-one billion, six hundred fifteen million, six hundred thirty-six thousand, four hundred six".