20403430421 has 8 divisors (see below), whose sum is σ = 23429776800. Its totient is φ = 17572332240.

The previous prime is 20403430373. The next prime is 20403430441. The reversal of 20403430421 is 12403430402.

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 20403430421 - 2⁶ = 20403430357 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 (20403430441) 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, 48811826 + ... + 48812243.

It is an arithmetic number, because the mean of its divisors is an integer number (2928722100).

Almost surely, 2^20403430421 is an apocalyptic number.

It is an amenable number.

20403430421 is a deficient number, since it is larger than the sum of its proper divisors (3026346379).

20403430421 is a wasteful number, since it uses less digits than its factorization.

20403430421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97624099.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20403430421 its reverse (12403430402), we get a palindrome (32806860823).

The spelling of 20403430421 in words is "twenty billion, four hundred three million, four hundred thirty thousand, four hundred twenty-one".