21990232555519 has 8 divisors (see below), whose sum is σ = 22388798597760. Its totient is φ = 21594134415000.

The previous prime is 21990232555451. The next prime is 21990232555549. The reversal of 21990232555519 is 91555523209912.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21990232555519 is a prime.

It is a super-2 number, since 2×21990232555519² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 8 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21990232555549) by changing a digit.

Being equal to 20×4²⁰-1, it is a generalized Woodall number.

It is a pernicious number, because its binary representation contains a prime number (43) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 616957449 + ... + 616993090.

It is an arithmetic number, because the mean of its divisors is an integer number (2798599824720).

Almost surely, 2^{21990232555519} is an apocalyptic number.

21990232555519 is a deficient number, since it is larger than the sum of its proper divisors (398566042241).

21990232555519 is a wasteful number, since it uses less digits than its factorization.

21990232555519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233950861.

The product of its (nonzero) digits is 10935000, while the sum is 58.

The spelling of 21990232555519 in words is "twenty-one trillion, nine hundred ninety billion, two hundred thirty-two million, five hundred fifty-five thousand, five hundred nineteen".