20155616436 has 24 divisors (see below), whose sum is σ = 47150681760. Its totient is φ = 6701265952.

The previous prime is 20155616413. The next prime is 20155616443. The reversal of 20155616436 is 63461655102.

It is a junction number, because it is equal to n+sod(n) for n = 20155616394 and 20155616403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2154246 + ... + 2163581.

It is an arithmetic number, because the mean of its divisors is an integer number (1964611740).

Almost surely, 2^20155616436 is an apocalyptic number.

It is an amenable number.

20155616436 is an abundant number, since it is smaller than the sum of its proper divisors (26995065324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20155616436 is a wasteful number, since it uses less digits than its factorization.

20155616436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4318223 (or 4318221 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 20155616436 in words is "twenty billion, one hundred fifty-five million, six hundred sixteen thousand, four hundred thirty-six".