20426122156542 has 16 divisors (see below), whose sum is σ = 40852300645632. Its totient is φ = 6808697996760.

The previous prime is 20426122156541. The next prime is 20426122156577. The reversal of 20426122156542 is 24565122162402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20426122156494 and 20426122156503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426122156541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3479067 + ... + 7277097.

It is an arithmetic number, because the mean of its divisors is an integer number (2553268790352).

Almost surely, 2^{20426122156542} is an apocalyptic number.

20426122156542 is an abundant number, since it is smaller than the sum of its proper divisors (20426178489090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20426122156542 is a wasteful number, since it uses less digits than its factorization.

20426122156542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4694383.

The product of its (nonzero) digits is 460800, while the sum is 42.

The spelling of 20426122156542 in words is "twenty trillion, four hundred twenty-six billion, one hundred twenty-two million, one hundred fifty-six thousand, five hundred forty-two".