20855647222246 has 4 divisors (see below), whose sum is σ = 31283470833372. Its totient is φ = 10427823611122.

The previous prime is 20855647222231. The next prime is 20855647222253. The reversal of 20855647222246 is 64222274655802.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5213911805560 + ... + 5213911805563.

It is an arithmetic number, because the mean of its divisors is an integer number (7820867708343).

Almost surely, 2^{20855647222246} is an apocalyptic number.

20855647222246 is a deficient number, since it is larger than the sum of its proper divisors (10427823611126).

20855647222246 is a wasteful number, since it uses less digits than its factorization.

20855647222246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10427823611125.

The product of its (nonzero) digits is 25804800, while the sum is 55.

The spelling of 20855647222246 in words is "twenty trillion, eight hundred fifty-five billion, six hundred forty-seven million, two hundred twenty-two thousand, two hundred forty-six".