21160422775 has 24 divisors (see below), whose sum is σ = 26339898960. Its totient is φ = 16863325440.

The previous prime is 21160422749. The next prime is 21160422821. The reversal of 21160422775 is 57722406112.

It is not a de Polignac number, because 21160422775 - 2¹⁷ = 21160291703 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13117869 + ... + 13119481.

It is an arithmetic number, because the mean of its divisors is an integer number (1097495790).

Almost surely, 2^21160422775 is an apocalyptic number.

21160422775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21160422775 is a deficient number, since it is larger than the sum of its proper divisors (5179476185).

21160422775 is a wasteful number, since it uses less digits than its factorization.

21160422775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3315 (or 3310 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

Adding to 21160422775 its reverse (57722406112), we get a palindrome (78882828887).

The spelling of 21160422775 in words is "twenty-one billion, one hundred sixty million, four hundred twenty-two thousand, seven hundred seventy-five".