20352435421 has 4 divisors (see below), whose sum is σ = 20477297152. Its totient is φ = 20227573692.

The previous prime is 20352435407. The next prime is 20352435437. The reversal of 20352435421 is 12453425302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20352435421 - 2²³ = 20344046813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20352435401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62430621 + ... + 62430946.

It is an arithmetic number, because the mean of its divisors is an integer number (5119324288).

Almost surely, 2^20352435421 is an apocalyptic number.

It is an amenable number.

20352435421 is a deficient number, since it is larger than the sum of its proper divisors (124861731).

20352435421 is a wasteful number, since it uses less digits than its factorization.

20352435421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124861730.

The product of its (nonzero) digits is 28800, while the sum is 31.

The spelling of 20352435421 in words is "twenty billion, three hundred fifty-two million, four hundred thirty-five thousand, four hundred twenty-one".