21774123883 has 16 divisors (see below), whose sum is σ = 22768285696. Its totient is φ = 20799529920.

The previous prime is 21774123863. The next prime is 21774123893. The reversal of 21774123883 is 38832147712.

It is a cyclic number.

It is not a de Polignac number, because 21774123883 - 2¹⁷ = 21773992811 is a prime.

It is a super-2 number, since 2×21774123883² (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 (21774123863) 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, 988516 + ... + 1010302.

It is an arithmetic number, because the mean of its divisors is an integer number (1423017856).

Almost surely, 2^21774123883 is an apocalyptic number.

21774123883 is a deficient number, since it is larger than the sum of its proper divisors (994161813).

21774123883 is a wasteful number, since it uses less digits than its factorization.

21774123883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22234.

The product of its digits is 451584, while the sum is 46.

The spelling of 21774123883 in words is "twenty-one billion, seven hundred seventy-four million, one hundred twenty-three thousand, eight hundred eighty-three".