20354621511206 has 24 divisors (see below), whose sum is σ = 30620322149592. Its totient is φ = 10147929480000.

The previous prime is 20354621511199. The next prime is 20354621511239. The reversal of 20354621511206 is 60211512645302.

It is a self number, because there is not a number n which added to its sum of digits gives 20354621511206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 695846081 + ... + 695875331.

It is an arithmetic number, because the mean of its divisors is an integer number (1275846756233).

Almost surely, 2^{20354621511206} is an apocalyptic number.

20354621511206 is a deficient number, since it is larger than the sum of its proper divisors (10265700638386).

20354621511206 is an equidigital number, since it uses as much as digits as its factorization.

20354621511206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31988 (or 31557 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 20354621511206 in words is "twenty trillion, three hundred fifty-four billion, six hundred twenty-one million, five hundred eleven thousand, two hundred six".