20400412330 has 16 divisors (see below), whose sum is σ = 36881098920. Its totient is φ = 8124530112.

The previous prime is 20400412289. The next prime is 20400412337. The reversal of 20400412330 is 3321400402.

It can be written as a sum of positive squares in 4 ways, for example, as 18711777681 + 1688634649 = 136791^2 + 41093^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20400412298 and 20400412307.

It is not an unprimeable number, because it can be changed into a prime (20400412337) 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, 4451949 + ... + 4456528.

Almost surely, 2^20400412330 is an apocalyptic number.

20400412330 is a deficient number, since it is larger than the sum of its proper divisors (16480686590).

20400412330 is a wasteful number, since it uses less digits than its factorization.

20400412330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8908713.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20400412330 its reverse (3321400402), we get a palindrome (23721812732).

The spelling of 20400412330 in words is "twenty billion, four hundred million, four hundred twelve thousand, three hundred thirty".