20404431412 has 12 divisors (see below), whose sum is σ = 35810661600. Its totient is φ = 10172813816.

The previous prime is 20404431361. The next prime is 20404431431. The reversal of 20404431412 is 21413440402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7348912 + ... + 7351687.

It is an arithmetic number, because the mean of its divisors is an integer number (2984221800).

Almost surely, 2^20404431412 is an apocalyptic number.

It is an amenable number.

20404431412 is a deficient number, since it is larger than the sum of its proper divisors (15406230188).

20404431412 is a wasteful number, since it uses less digits than its factorization.

20404431412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14700950 (or 14700948 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 20404431412 its reverse (21413440402), we get a palindrome (41817871814).

The spelling of 20404431412 in words is "twenty billion, four hundred four million, four hundred thirty-one thousand, four hundred twelve".