20861573370846 has 48 divisors (see below), whose sum is σ = 47421961436304. Its totient is φ = 6081106399488.

The previous prime is 20861573370839. The next prime is 20861573370853. The reversal of 20861573370846 is 64807337516802.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20861573370839) and next prime (20861573370853).

It is a self number, because there is not a number n which added to its sum of digits gives 20861573370846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 370409611 + ... + 370465926.

It is an arithmetic number, because the mean of its divisors is an integer number (987957529923).

Almost surely, 2^{20861573370846} is an apocalyptic number.

20861573370846 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20861573370846 is an abundant number, since it is smaller than the sum of its proper divisors (26560388065458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20861573370846 is a wasteful number, since it uses less digits than its factorization.

20861573370846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740875593 (or 740875574 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 60.

The spelling of 20861573370846 in words is "twenty trillion, eight hundred sixty-one billion, five hundred seventy-three million, three hundred seventy thousand, eight hundred forty-six".