20015315356601 has 4 divisors (see below), whose sum is σ = 20015487782400. Its totient is φ = 20015142930804.

The previous prime is 20015315356583. The next prime is 20015315356609. The reversal of 20015315356601 is 10665351351002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20015315356601 is a prime.

It is a super-2 number, since 2×20015315356601² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20015315356609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86038661 + ... + 86270978.

It is an arithmetic number, because the mean of its divisors is an integer number (5003871945600).

Almost surely, 2^{20015315356601} is an apocalyptic number.

It is an amenable number.

20015315356601 is a deficient number, since it is larger than the sum of its proper divisors (172425799).

20015315356601 is a wasteful number, since it uses less digits than its factorization.

20015315356601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172425798.

The product of its (nonzero) digits is 81000, while the sum is 38.

The spelling of 20015315356601 in words is "twenty trillion, fifteen billion, three hundred fifteen million, three hundred fifty-six thousand, six hundred one".