21046850245 has 16 divisors (see below), whose sum is σ = 25500407040. Its totient is φ = 16674790464.

The previous prime is 21046850239. The next prime is 21046850257. The reversal of 21046850245 is 54205864012.

It is a cyclic number.

It is not a de Polignac number, because 21046850245 - 2⁵ = 21046850213 is a prime.

It is a congruent 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, 3136564 + ... + 3143266.

It is an arithmetic number, because the mean of its divisors is an integer number (1593775440).

Almost surely, 2^21046850245 is an apocalyptic number.

It is an amenable number.

21046850245 is a deficient number, since it is larger than the sum of its proper divisors (4453556795).

21046850245 is a wasteful number, since it uses less digits than its factorization.

21046850245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12684.

The product of its (nonzero) digits is 76800, while the sum is 37.

The spelling of 21046850245 in words is "twenty-one billion, forty-six million, eight hundred fifty thousand, two hundred forty-five".