20035400521 has 8 divisors (see below), whose sum is σ = 20503242144. Its totient is φ = 19567645440.

The previous prime is 20035400513. The next prime is 20035400557. The reversal of 20035400521 is 12500453002.

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

It is a cyclic number.

It is not a de Polignac number, because 20035400521 - 2³ = 20035400513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20035400492 and 20035400501.

It is not an unprimeable number, because it can be changed into a prime (20035400591) 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, 870441 + ... + 893161.

It is an arithmetic number, because the mean of its divisors is an integer number (2562905268).

Almost surely, 2^20035400521 is an apocalyptic number.

It is an amenable number.

20035400521 is a deficient number, since it is larger than the sum of its proper divisors (467841623).

20035400521 is a wasteful number, since it uses less digits than its factorization.

20035400521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43271.

The product of its (nonzero) digits is 1200, while the sum is 22.

Adding to 20035400521 its reverse (12500453002), we get a palindrome (32535853523).

The spelling of 20035400521 in words is "twenty billion, thirty-five million, four hundred thousand, five hundred twenty-one".