21887522719 has 8 divisors (see below), whose sum is σ = 22198700160. Its totient is φ = 21577475736.

The previous prime is 21887522711. The next prime is 21887522737. The reversal of 21887522719 is 91722578812.

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 21887522719 - 2³ = 21887522711 is a prime.

It is a super-2 number, since 2×21887522719² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21887522711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243579 + ... + 321100.

It is an arithmetic number, because the mean of its divisors is an integer number (2774837520).

Almost surely, 2^21887522719 is an apocalyptic number.

21887522719 is a deficient number, since it is larger than the sum of its proper divisors (311177441).

21887522719 is an equidigital number, since it uses as much as digits as its factorization.

21887522719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565229.

The product of its digits is 1128960, while the sum is 52.

The spelling of 21887522719 in words is "twenty-one billion, eight hundred eighty-seven million, five hundred twenty-two thousand, seven hundred nineteen".