20678138293065 has 64 divisors (see below), whose sum is σ = 37341430410240. Its totient is φ = 9678984456960.

The previous prime is 20678138293009. The next prime is 20678138293067. The reversal of 20678138293065 is 56039283187602.

It is not a de Polignac number, because 20678138293065 - 2¹⁰ = 20678138292041 is a prime.

It is a super-2 number, since 2×20678138293065² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20678138293067) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44186394 + ... + 44651916.

It is an arithmetic number, because the mean of its divisors is an integer number (583459850160).

Almost surely, 2^{20678138293065} is an apocalyptic number.

It is an amenable number.

20678138293065 is a deficient number, since it is larger than the sum of its proper divisors (16663292117175).

20678138293065 is a wasteful number, since it uses less digits than its factorization.

20678138293065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474854.

The product of its (nonzero) digits is 26127360, while the sum is 60.

The spelling of 20678138293065 in words is "twenty trillion, six hundred seventy-eight billion, one hundred thirty-eight million, two hundred ninety-three thousand, sixty-five".