21252929422805 has 8 divisors (see below), whose sum is σ = 25537474719744. Its totient is φ = 16979703930000.

The previous prime is 21252929422717. The next prime is 21252929422841. The reversal of 21252929422805 is 50822492925212.

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

It is not a de Polignac number, because 21252929422805 - 2³⁶ = 21184209946069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2829946901 + ... + 2829954410.

It is an arithmetic number, because the mean of its divisors is an integer number (3192184339968).

Almost surely, 2^{21252929422805} is an apocalyptic number.

It is an amenable number.

21252929422805 is a deficient number, since it is larger than the sum of its proper divisors (4284545296939).

21252929422805 is an equidigital number, since it uses as much as digits as its factorization.

21252929422805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5659902067.

The product of its (nonzero) digits is 4147200, while the sum is 53.

The spelling of 21252929422805 in words is "twenty-one trillion, two hundred fifty-two billion, nine hundred twenty-nine million, four hundred twenty-two thousand, eight hundred five".