21125023419 has 8 divisors (see below), whose sum is σ = 28587096640. Its totient is φ = 13873149576.

The previous prime is 21125023351. The next prime is 21125023453. The reversal of 21125023419 is 91432052112.

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

It is not a de Polignac number, because 21125023419 - 2¹³ = 21125015227 is a prime.

It is a super-2 number, since 2×21125023419² (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 (21125023499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52549609 + ... + 52550010.

It is an arithmetic number, because the mean of its divisors is an integer number (3573387080).

Almost surely, 2^21125023419 is an apocalyptic number.

21125023419 is a deficient number, since it is larger than the sum of its proper divisors (7462073221).

21125023419 is a wasteful number, since it uses less digits than its factorization.

21125023419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105099689.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 21125023419 in words is "twenty-one billion, one hundred twenty-five million, twenty-three thousand, four hundred nineteen".