20615602156 has 6 divisors (see below), whose sum is σ = 36077303780. Its totient is φ = 10307801076.

The previous prime is 20615602097. The next prime is 20615602199. The reversal of 20615602156 is 65120651602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2576950266 + ... + 2576950273.

Almost surely, 2^20615602156 is an apocalyptic number.

It is an amenable number.

20615602156 is a deficient number, since it is larger than the sum of its proper divisors (15461701624).

20615602156 is a wasteful number, since it uses less digits than its factorization.

20615602156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153900543 (or 5153900541 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 20615602156 in words is "twenty billion, six hundred fifteen million, six hundred two thousand, one hundred fifty-six".