21742384070919 has 16 divisors (see below), whose sum is σ = 29004188476032. Its totient is φ = 14487752264928.

The previous prime is 21742384070899. The next prime is 21742384070969. The reversal of 21742384070919 is 91907048324712.

It is not a de Polignac number, because 21742384070919 - 2¹¹ = 21742384068871 is a prime.

It is a super-2 number, since 2×21742384070919² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21742384070969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85202772 + ... + 85457574.

It is an arithmetic number, because the mean of its divisors is an integer number (1812761779752).

Almost surely, 2^{21742384070919} is an apocalyptic number.

21742384070919 is a deficient number, since it is larger than the sum of its proper divisors (7261804405113).

21742384070919 is a wasteful number, since it uses less digits than its factorization.

21742384070919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268766.

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 21742384070919 in words is "twenty-one trillion, seven hundred forty-two billion, three hundred eighty-four million, seventy thousand, nine hundred nineteen".