20543413540507 has 24 divisors (see below), whose sum is σ = 24328047262608. Its totient is φ = 17196236928000.

The previous prime is 20543413540423. The next prime is 20543413540511. The reversal of 20543413540507 is 70504531434502.

It is a de Polignac number, because none of the positive numbers 2^k-20543413540507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20543413540207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13033578 + ... + 14524495.

It is an arithmetic number, because the mean of its divisors is an integer number (1013668635942).

Almost surely, 2^{20543413540507} is an apocalyptic number.

20543413540507 is a deficient number, since it is larger than the sum of its proper divisors (3784633722101).

20543413540507 is a wasteful number, since it uses less digits than its factorization.

20543413540507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27558511 (or 27558498 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 43.

The spelling of 20543413540507 in words is "twenty trillion, five hundred forty-three billion, four hundred thirteen million, five hundred forty thousand, five hundred seven".