20525543474 has 16 divisors (see below), whose sum is σ = 31203542400. Its totient is φ = 10124575344.

The previous prime is 20525543473. The next prime is 20525543483. The reversal of 20525543474 is 47434552502.

It is not an unprimeable number, because it can be changed into a prime (20525543473) by changing a digit.

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, 142937 + ... + 247955.

It is an arithmetic number, because the mean of its divisors is an integer number (1950221400).

Almost surely, 2^20525543474 is an apocalyptic number.

20525543474 is a deficient number, since it is larger than the sum of its proper divisors (10677998926).

20525543474 is a wasteful number, since it uses less digits than its factorization.

20525543474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106337.

The product of its (nonzero) digits is 672000, while the sum is 41.

The spelling of 20525543474 in words is "twenty billion, five hundred twenty-five million, five hundred forty-three thousand, four hundred seventy-four".