20551126442 has 16 divisors (see below), whose sum is σ = 38433275712. Its totient is φ = 8006932320.

The previous prime is 20551126429. The next prime is 20551126471. The reversal of 20551126442 is 24462115502.

It is a junction number, because it is equal to n+sod(n) for n = 20551126399 and 20551126408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66724283 + ... + 66724590.

It is an arithmetic number, because the mean of its divisors is an integer number (2402079732).

Almost surely, 2^20551126442 is an apocalyptic number.

20551126442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20551126442 is a deficient number, since it is larger than the sum of its proper divisors (17882149270).

20551126442 is a wasteful number, since it uses less digits than its factorization.

20551126442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133448893.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 20551126442 in words is "twenty billion, five hundred fifty-one million, one hundred twenty-six thousand, four hundred forty-two".