20847855862 has 8 divisors (see below), whose sum is σ = 31296825000. Its totient is φ = 10415580864.

The previous prime is 20847855859. The next prime is 20847855901. The reversal of 20847855862 is 26855874802.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4170412 + ... + 4175407.

It is an arithmetic number, because the mean of its divisors is an integer number (3912103125).

Almost surely, 2^20847855862 is an apocalyptic number.

20847855862 is a deficient number, since it is larger than the sum of its proper divisors (10448969138).

20847855862 is a wasteful number, since it uses less digits than its factorization.

20847855862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8347070.

The product of its (nonzero) digits is 8601600, while the sum is 55.

The spelling of 20847855862 in words is "twenty billion, eight hundred forty-seven million, eight hundred fifty-five thousand, eight hundred sixty-two".