21762926536 has 32 divisors (see below), whose sum is σ = 44115414840. Its totient is φ = 10005331968.

The previous prime is 21762926527. The next prime is 21762926539. The reversal of 21762926536 is 63562926712.

It can be written as a sum of positive squares in 4 ways, for example, as 21695522436 + 67404100 = 147294^2 + 8210^2 .

It is a super-2 number, since 2×21762926536² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21762926536.

It is not an unprimeable number, because it can be changed into a prime (21762926539) 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 7 ways as a sum of consecutive naturals, for example, 380391 + ... + 433846.

Almost surely, 2^21762926536 is an apocalyptic number.

21762926536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21762926536 is an abundant number, since it is smaller than the sum of its proper divisors (22352488304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21762926536 is a wasteful number, since it uses less digits than its factorization.

21762926536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814513 (or 814509 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 49.

The spelling of 21762926536 in words is "twenty-one billion, seven hundred sixty-two million, nine hundred twenty-six thousand, five hundred thirty-six".