21596496757 has 8 divisors (see below), whose sum is σ = 24061087872. Its totient is φ = 19215451200.

The previous prime is 21596496749. The next prime is 21596496787. The reversal of 21596496757 is 75769469512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21596496757 - 2³ = 21596496749 is a prime.

It is a super-2 number, since 2×21596496757² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21596496695 and 21596496704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21596496787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20885844 + ... + 20886877.

It is an arithmetic number, because the mean of its divisors is an integer number (3007635984).

Almost surely, 2^21596496757 is an apocalyptic number.

It is an amenable number.

21596496757 is a deficient number, since it is larger than the sum of its proper divisors (2464591115).

21596496757 is a wasteful number, since it uses less digits than its factorization.

21596496757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41772779.

The product of its digits is 28576800, while the sum is 61.

The spelling of 21596496757 in words is "twenty-one billion, five hundred ninety-six million, four hundred ninety-six thousand, seven hundred fifty-seven".