21424757092 has 6 divisors (see below), whose sum is σ = 37493324918. Its totient is φ = 10712378544.

The previous prime is 21424757089. The next prime is 21424757099. The reversal of 21424757092 is 29075742412.

It can be written as a sum of positive squares in only one way, i.e., 12754540096 + 8670216996 = 112936^2 + 93114^2 .

It is not an unprimeable number, because it can be changed into a prime (21424757099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2678094633 + ... + 2678094640.

Almost surely, 2^21424757092 is an apocalyptic number.

It is an amenable number.

21424757092 is a deficient number, since it is larger than the sum of its proper divisors (16068567826).

21424757092 is a wasteful number, since it uses less digits than its factorization.

21424757092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5356189277 (or 5356189275 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 21424757092 in words is "twenty-one billion, four hundred twenty-four million, seven hundred fifty-seven thousand, ninety-two".