21026250955 has 16 divisors (see below), whose sum is σ = 25636673664. Its totient is φ = 16551959040.

The previous prime is 21026250923. The next prime is 21026250967. The reversal of 21026250955 is 55905262012.

It is not a de Polignac number, because 21026250955 - 2⁵ = 21026250923 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90487 + ... + 224143.

It is an arithmetic number, because the mean of its divisors is an integer number (1602292104).

Almost surely, 2^21026250955 is an apocalyptic number.

21026250955 is a deficient number, since it is larger than the sum of its proper divisors (4610422709).

21026250955 is a wasteful number, since it uses less digits than its factorization.

21026250955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134166.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 21026250955 in words is "twenty-one billion, twenty-six million, two hundred fifty thousand, nine hundred fifty-five".