21920719093 has 16 divisors (see below), whose sum is σ = 27139006720. Its totient is φ = 17343853488.

The previous prime is 21920719087. The next prime is 21920719109. The reversal of 21920719093 is 39091702912.

It is not a de Polignac number, because 21920719093 - 2⁹ = 21920718581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21920719063) 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 15 ways as a sum of consecutive naturals, for example, 697305 + ... + 728062.

It is an arithmetic number, because the mean of its divisors is an integer number (1696187920).

Almost surely, 2^21920719093 is an apocalyptic number.

It is an amenable number.

21920719093 is a deficient number, since it is larger than the sum of its proper divisors (5218287627).

21920719093 is an equidigital number, since it uses as much as digits as its factorization.

21920719093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425413 (or 1425387 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 43.

The spelling of 21920719093 in words is "twenty-one billion, nine hundred twenty million, seven hundred nineteen thousand, ninety-three".