21001552620026 has 8 divisors (see below), whose sum is σ = 34366177014624. Its totient is φ = 9546160281820.

The previous prime is 21001552619923. The next prime is 21001552620071. The reversal of 21001552620026 is 62002625510012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21001552619974 and 21001552620001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477308014070 + ... + 477308014113.

It is an arithmetic number, because the mean of its divisors is an integer number (4295772126828).

Almost surely, 2^{21001552620026} is an apocalyptic number.

21001552620026 is a deficient number, since it is larger than the sum of its proper divisors (13364624394598).

21001552620026 is a wasteful number, since it uses less digits than its factorization.

21001552620026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954616028196.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 21001552620026 in words is "twenty-one trillion, one billion, five hundred fifty-two million, six hundred twenty thousand, twenty-six".