20524421553 has 8 divisors (see below), whose sum is σ = 27366606528. Its totient is φ = 13682592144.

The previous prime is 20524421549. The next prime is 20524421581. The reversal of 20524421553 is 35512442502.

It is a happy number.

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

It is not a de Polignac number, because 20524421553 - 2² = 20524421549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20524421513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108276 + ... + 229722.

It is an arithmetic number, because the mean of its divisors is an integer number (3420825816).

Almost surely, 2^20524421553 is an apocalyptic number.

It is an amenable number.

20524421553 is a deficient number, since it is larger than the sum of its proper divisors (6842184975).

20524421553 is a wasteful number, since it uses less digits than its factorization.

20524421553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177783.

The product of its (nonzero) digits is 48000, while the sum is 33.

The spelling of 20524421553 in words is "twenty billion, five hundred twenty-four million, four hundred twenty-one thousand, five hundred fifty-three".