21350077537 has 8 divisors (see below), whose sum is σ = 21424208832. Its totient is φ = 21275982000.

The previous prime is 21350077523. The next prime is 21350077577. The reversal of 21350077537 is 73577005312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21350077537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21350077537.

It is not an unprimeable number, because it can be changed into a prime (21350077517) 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, 1818787 + ... + 1830487.

It is an arithmetic number, because the mean of its divisors is an integer number (2678026104).

Almost surely, 2^21350077537 is an apocalyptic number.

It is an amenable number.

21350077537 is a deficient number, since it is larger than the sum of its proper divisors (74131295).

21350077537 is a wasteful number, since it uses less digits than its factorization.

21350077537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17879.

The product of its (nonzero) digits is 154350, while the sum is 40.

The spelling of 21350077537 in words is "twenty-one billion, three hundred fifty million, seventy-seven thousand, five hundred thirty-seven".