21073551026 has 32 divisors (see below), whose sum is σ = 35598391488. Its totient is φ = 9273277440.

The previous prime is 21073551011. The next prime is 21073551041. The reversal of 21073551026 is 62015537012.

It is an interprime number because it is at equal distance from previous prime (21073551011) and next prime (21073551041).

It is a junction number, because it is equal to n+sod(n) for n = 21073550983 and 21073551001.

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 15 ways as a sum of consecutive naturals, for example, 8330 + ... + 205466.

It is an arithmetic number, because the mean of its divisors is an integer number (1112449734).

Almost surely, 2^21073551026 is an apocalyptic number.

21073551026 is a deficient number, since it is larger than the sum of its proper divisors (14524840462).

21073551026 is a wasteful number, since it uses less digits than its factorization.

21073551026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197306.

The product of its (nonzero) digits is 12600, while the sum is 32.

The spelling of 21073551026 in words is "twenty-one billion, seventy-three million, five hundred fifty-one thousand, twenty-six".