20550532515534 has 72 divisors (see below), whose sum is σ = 51798053998080. Its totient is φ = 5871317260032.

The previous prime is 20550532515521. The next prime is 20550532515553. The reversal of 20550532515534 is 43551523505502.

It is a happy number.

20550532515534 is a `hidden beast` number, since 2 + 0 + 5 + 50 + 5 + 32 + 515 + 53 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20550532515534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19583262 + ... + 20605950.

It is an arithmetic number, because the mean of its divisors is an integer number (719417416640).

Almost surely, 2^{20550532515534} is an apocalyptic number.

20550532515534 is an abundant number, since it is smaller than the sum of its proper divisors (31247521482546).

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

20550532515534 is a wasteful number, since it uses less digits than its factorization.

20550532515534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045494 (or 1045484 counting only the distinct ones).

The product of its (nonzero) digits is 2250000, while the sum is 45.

The spelling of 20550532515534 in words is "twenty trillion, five hundred fifty billion, five hundred thirty-two million, five hundred fifteen thousand, five hundred thirty-four".