20612355539 has 8 divisors (see below), whose sum is σ = 21369498192. Its totient is φ = 19867327360.

The previous prime is 20612355529. The next prime is 20612355553. The reversal of 20612355539 is 93555321602.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-20612355539 is a prime.

It is a super-2 number, since 2×20612355539² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20612355496 and 20612355505.

It is not an unprimeable number, because it can be changed into a prime (20612355509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3025154 + ... + 3031959.

It is an arithmetic number, because the mean of its divisors is an integer number (2671187274).

Almost surely, 2^20612355539 is an apocalyptic number.

20612355539 is a deficient number, since it is larger than the sum of its proper divisors (757142653).

20612355539 is an equidigital number, since it uses as much as digits as its factorization.

20612355539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6057237.

The product of its (nonzero) digits is 243000, while the sum is 41.

The spelling of 20612355539 in words is "twenty billion, six hundred twelve million, three hundred fifty-five thousand, five hundred thirty-nine".