21150570206645 has 8 divisors (see below), whose sum is σ = 27688019179680. Its totient is φ = 15382232877520.

The previous prime is 21150570206639. The next prime is 21150570206651. The reversal of 21150570206645 is 54660207505112.

It is an interprime number because it is at equal distance from previous prime (21150570206639) and next prime (21150570206651).

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

It is not a de Polignac number, because 21150570206645 - 2²² = 21150566012341 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21150570206596 and 21150570206605.

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, 192277910915 + ... + 192277911024.

It is an arithmetic number, because the mean of its divisors is an integer number (3461002397460).

Almost surely, 2^{21150570206645} is an apocalyptic number.

It is an amenable number.

21150570206645 is a deficient number, since it is larger than the sum of its proper divisors (6537448973035).

21150570206645 is a wasteful number, since it uses less digits than its factorization.

21150570206645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384555821955.

The product of its (nonzero) digits is 504000, while the sum is 44.

The spelling of 21150570206645 in words is "twenty-one trillion, one hundred fifty billion, five hundred seventy million, two hundred six thousand, six hundred forty-five".