20520541154 has 8 divisors (see below), whose sum is σ = 31285415388. Its totient is φ = 10092069360.

The previous prime is 20520541091. The next prime is 20520541157. The reversal of 20520541154 is 45114502502.

It can be written as a sum of positive squares in 2 ways, for example, as 17588860129 + 2931681025 = 132623^2 + 54145^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20520541157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84100457 + ... + 84100700.

Almost surely, 2^20520541154 is an apocalyptic number.

20520541154 is a deficient number, since it is larger than the sum of its proper divisors (10764874234).

20520541154 is a wasteful number, since it uses less digits than its factorization.

20520541154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168201220.

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 20520541154 in words is "twenty billion, five hundred twenty million, five hundred forty-one thousand, one hundred fifty-four".