20543413540550 has 12 divisors (see below), whose sum is σ = 38210749185516. Its totient is φ = 8217365416200.

The previous prime is 20543413540549. The next prime is 20543413540589. The reversal of 20543413540550 is 5504531434502.

It is a junction number, because it is equal to n+sod(n) for n = 20543413540498 and 20543413540507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 205434135356 + ... + 205434135455.

It is an arithmetic number, because the mean of its divisors is an integer number (3184229098793).

Almost surely, 2^{20543413540550} is an apocalyptic number.

20543413540550 is a deficient number, since it is larger than the sum of its proper divisors (17667335644966).

20543413540550 is a wasteful number, since it uses less digits than its factorization.

20543413540550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410868270823 (or 410868270818 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 41.

The spelling of 20543413540550 in words is "twenty trillion, five hundred forty-three billion, four hundred thirteen million, five hundred forty thousand, five hundred fifty".