20152220655 has 16 divisors (see below), whose sum is σ = 36849775104. Its totient is φ = 9212443680.

The previous prime is 20152220651. The next prime is 20152220723. The reversal of 20152220655 is 55602225102.

It is not a de Polignac number, because 20152220655 - 2² = 20152220651 is a prime.

It is a super-2 number, since 2×20152220655² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20152220651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95962851 + ... + 95963060.

It is an arithmetic number, because the mean of its divisors is an integer number (2303110944).

Almost surely, 2^20152220655 is an apocalyptic number.

20152220655 is a deficient number, since it is larger than the sum of its proper divisors (16697554449).

20152220655 is a wasteful number, since it uses less digits than its factorization.

20152220655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191925926.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 20152220655 its reverse (55602225102), we get a palindrome (75754445757).

The spelling of 20152220655 in words is "twenty billion, one hundred fifty-two million, two hundred twenty thousand, six hundred fifty-five".