20545324521 has 8 divisors (see below), whose sum is σ = 27740522880. Its totient is φ = 13523504592.

The previous prime is 20545324507. The next prime is 20545324561. The reversal of 20545324521 is 12542354502.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-20545324521 is a prime.

It is a super-2 number, since 2×20545324521² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20545324561) 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, 43344330 + ... + 43344803.

It is an arithmetic number, because the mean of its divisors is an integer number (3467565360).

Almost surely, 2^20545324521 is an apocalyptic number.

It is an amenable number.

20545324521 is a deficient number, since it is larger than the sum of its proper divisors (7195198359).

20545324521 is an equidigital number, since it uses as much as digits as its factorization.

20545324521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86689215.

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

The spelling of 20545324521 in words is "twenty billion, five hundred forty-five million, three hundred twenty-four thousand, five hundred twenty-one".