21887248419 has 12 divisors (see below), whose sum is σ = 31645532776. Its totient is φ = 14577367392.

The previous prime is 21887248391. The next prime is 21887248423. The reversal of 21887248419 is 91484278812.

21887248419 is a `hidden beast` number, since 2 + 1 + 88 + 72 + 484 + 19 = 666.

It is not a de Polignac number, because 21887248419 - 2¹³ = 21887240227 is a prime.

It is a super-2 number, since 2×21887248419² (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 (21887248429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1167817 + ... + 1186410.

Almost surely, 2^21887248419 is an apocalyptic number.

21887248419 is a deficient number, since it is larger than the sum of its proper divisors (9758284357).

21887248419 is a wasteful number, since it uses less digits than its factorization.

21887248419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355266 (or 2355263 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The spelling of 21887248419 in words is "twenty-one billion, eight hundred eighty-seven million, two hundred forty-eight thousand, four hundred nineteen".