20430257433 has 32 divisors (see below), whose sum is σ = 30858560640. Its totient is φ = 11945180160.

The previous prime is 20430257429. The next prime is 20430257437. The reversal of 20430257433 is 33475203402.

It is an interprime number because it is at equal distance from previous prime (20430257429) and next prime (20430257437).

It is not a de Polignac number, because 20430257433 - 2² = 20430257429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20430257394 and 20430257403.

It is not an unprimeable number, because it can be changed into a prime (20430257437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113710 + ... + 231927.

It is an arithmetic number, because the mean of its divisors is an integer number (964330020).

Almost surely, 2^20430257433 is an apocalyptic number.

It is an amenable number.

20430257433 is a deficient number, since it is larger than the sum of its proper divisors (10428303207).

20430257433 is a wasteful number, since it uses less digits than its factorization.

20430257433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345737.

The product of its (nonzero) digits is 60480, while the sum is 33.

The spelling of 20430257433 in words is "twenty billion, four hundred thirty million, two hundred fifty-seven thousand, four hundred thirty-three".