21769152727 has 12 divisors (see below), whose sum is σ = 25331326680. Its totient is φ = 18653359536.

The previous prime is 21769152721. The next prime is 21769152733. The reversal of 21769152727 is 72725196712.

It is an interprime number because it is at equal distance from previous prime (21769152721) and next prime (21769152733).

It is not a de Polignac number, because 21769152727 - 2³¹ = 19621669079 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21769152721) 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 11 ways as a sum of consecutive naturals, for example, 89428 + ... + 227014.

It is an arithmetic number, because the mean of its divisors is an integer number (2110943890).

Almost surely, 2^21769152727 is an apocalyptic number.

21769152727 is a deficient number, since it is larger than the sum of its proper divisors (3562173953).

21769152727 is a wasteful number, since it uses less digits than its factorization.

21769152727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140830 (or 140823 counting only the distinct ones).

The product of its digits is 740880, while the sum is 49.

The spelling of 21769152727 in words is "twenty-one billion, seven hundred sixty-nine million, one hundred fifty-two thousand, seven hundred twenty-seven".