20321131430 has 16 divisors (see below), whose sum is σ = 37839348720. Its totient is φ = 7848160992.

The previous prime is 20321131409. The next prime is 20321131469. The reversal of 20321131430 is 3413112302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35036144 + ... + 35036723.

It is an arithmetic number, because the mean of its divisors is an integer number (2364959295).

Almost surely, 2^20321131430 is an apocalyptic number.

20321131430 is a deficient number, since it is larger than the sum of its proper divisors (17518217290).

20321131430 is a wasteful number, since it uses less digits than its factorization.

20321131430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70072903.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20321131430 its reverse (3413112302), we get a palindrome (23734243732).

The spelling of 20321131430 in words is "twenty billion, three hundred twenty-one million, one hundred thirty-one thousand, four hundred thirty".