20121605013 has 8 divisors (see below), whose sum is σ = 27066230208. Its totient is φ = 13295691584.

The previous prime is 20121605011. The next prime is 20121605041. The reversal of 20121605013 is 31050612102.

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 20121605013 - 2¹ = 20121605011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121605011) 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, 29677545 + ... + 29678222.

It is an arithmetic number, because the mean of its divisors is an integer number (3383278776).

Almost surely, 2^20121605013 is an apocalyptic number.

It is an amenable number.

20121605013 is a deficient number, since it is larger than the sum of its proper divisors (6944625195).

20121605013 is a wasteful number, since it uses less digits than its factorization.

20121605013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59355883.

The product of its (nonzero) digits is 360, while the sum is 21.

The spelling of 20121605013 in words is "twenty billion, one hundred twenty-one million, six hundred five thousand, thirteen".