21085625419 has 8 divisors (see below), whose sum is σ = 22330991088. Its totient is φ = 19840819200.

The previous prime is 21085625401. The next prime is 21085625437. The reversal of 21085625419 is 91452658012.

It is an interprime number because it is at equal distance from previous prime (21085625401) and next prime (21085625437).

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

It is a cyclic number.

It is not a de Polignac number, because 21085625419 - 2¹¹ = 21085623371 is a prime.

It is a super-2 number, since 2×21085625419² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21085625489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60982 + ... + 214219.

It is an arithmetic number, because the mean of its divisors is an integer number (2791373886).

Almost surely, 2^21085625419 is an apocalyptic number.

21085625419 is a deficient number, since it is larger than the sum of its proper divisors (1245365669).

21085625419 is a wasteful number, since it uses less digits than its factorization.

21085625419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279725.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 21085625419 in words is "twenty-one billion, eighty-five million, six hundred twenty-five thousand, four hundred nineteen".