20550456156 has 48 divisors (see below), whose sum is σ = 49078149120. Its totient is φ = 6689776320.

The previous prime is 20550456149. The next prime is 20550456167. The reversal of 20550456156 is 65165405502.

It is a happy number.

It is a super-3 number, since 3×20550456156³ (a number of 32 digits) contains 333 as substring.

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 15 ways as a sum of consecutive naturals, for example, 220485 + ... + 299523.

It is an arithmetic number, because the mean of its divisors is an integer number (1022461440).

Almost surely, 2^20550456156 is an apocalyptic number.

It is an amenable number.

20550456156 is an abundant number, since it is smaller than the sum of its proper divisors (28527692964).

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

20550456156 is a wasteful number, since it uses less digits than its factorization.

20550456156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79554 (or 79552 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 20550456156 in words is "twenty billion, five hundred fifty million, four hundred fifty-six thousand, one hundred fifty-six".