20115465562101 has 96 divisors (see below), whose sum is σ = 33713590417920. Its totient is φ = 10574364036096.

The previous prime is 20115465562097. The next prime is 20115465562117. The reversal of 20115465562101 is 10126556451102.

It is not a de Polignac number, because 20115465562101 - 2² = 20115465562097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20115465562101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115465562301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 862092031 + ... + 862115363.

It is an arithmetic number, because the mean of its divisors is an integer number (351183233520).

Almost surely, 2^{20115465562101} is an apocalyptic number.

20115465562101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20115465562101 is a deficient number, since it is larger than the sum of its proper divisors (13598124855819).

20115465562101 is a wasteful number, since it uses less digits than its factorization.

20115465562101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24875 (or 24868 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

The spelling of 20115465562101 in words is "twenty trillion, one hundred fifteen billion, four hundred sixty-five million, five hundred sixty-two thousand, one hundred one".