20821862676117 has 8 divisors (see below), whose sum is σ = 28353174708096. Its totient is φ = 13585896214112.

The previous prime is 20821862676101. The next prime is 20821862676133. The reversal of 20821862676117 is 71167626812802.

It is an interprime number because it is at equal distance from previous prime (20821862676101) and next prime (20821862676133).

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

It is a cyclic number.

It is not a de Polignac number, because 20821862676117 - 2⁴ = 20821862676101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20821862676217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73836392328 + ... + 73836392609.

It is an arithmetic number, because the mean of its divisors is an integer number (3544146838512).

Almost surely, 2^{20821862676117} is an apocalyptic number.

It is an amenable number.

20821862676117 is a deficient number, since it is larger than the sum of its proper divisors (7531312031979).

20821862676117 is a wasteful number, since it uses less digits than its factorization.

20821862676117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147672784987.

The product of its (nonzero) digits is 5419008, while the sum is 57.

The spelling of 20821862676117 in words is "twenty trillion, eight hundred twenty-one billion, eight hundred sixty-two million, six hundred seventy-six thousand, one hundred seventeen".