20615653462153 has 8 divisors (see below), whose sum is σ = 20686331900808. Its totient is φ = 20544977186304.

The previous prime is 20615653462133. The next prime is 20615653462213. The reversal of 20615653462153 is 35126435651602.

It can be written as a sum of positive squares in 4 ways, for example, as 12774712633929 + 7840940828224 = 3574173^2 + 2800168^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20615653462153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20615653462097 and 20615653462106.

It is not an unprimeable number, because it can be changed into a prime (20615653462133) 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, 19874425 + ... + 20885977.

It is an arithmetic number, because the mean of its divisors is an integer number (2585791487601).

Almost surely, 2^{20615653462153} is an apocalyptic number.

It is an amenable number.

20615653462153 is a deficient number, since it is larger than the sum of its proper divisors (70678438655).

20615653462153 is a wasteful number, since it uses less digits than its factorization.

20615653462153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081403.

The product of its (nonzero) digits is 3888000, while the sum is 49.

The spelling of 20615653462153 in words is "twenty trillion, six hundred fifteen billion, six hundred fifty-three million, four hundred sixty-two thousand, one hundred fifty-three".