20155217053 has 8 divisors (see below), whose sum is σ = 20218638528. Its totient is φ = 20091826944.

The previous prime is 20155217023. The next prime is 20155217077. The reversal of 20155217053 is 35071255102.

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-20155217053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155217003) 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, 2363325 + ... + 2371837.

It is an arithmetic number, because the mean of its divisors is an integer number (2527329816).

Almost surely, 2^20155217053 is an apocalyptic number.

It is an amenable number.

20155217053 is a deficient number, since it is larger than the sum of its proper divisors (63421475).

20155217053 is an equidigital number, since it uses as much as digits as its factorization.

20155217053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15683.

The product of its (nonzero) digits is 10500, while the sum is 31.

The spelling of 20155217053 in words is "twenty billion, one hundred fifty-five million, two hundred seventeen thousand, fifty-three".