20400422024 has 8 divisors (see below), whose sum is σ = 38250791310. Its totient is φ = 10200211008.

The previous prime is 20400422023. The next prime is 20400422057. The reversal of 20400422024 is 42022400402.

It can be written as a sum of positive squares in only one way, i.e., 20388984100 + 11437924 = 142790^2 + 3382^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 20400421987 and 20400422005.

It is not an unprimeable number, because it can be changed into a prime (20400422023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275026369 + ... + 1275026384.

Almost surely, 2^20400422024 is an apocalyptic number.

It is an amenable number.

20400422024 is a deficient number, since it is larger than the sum of its proper divisors (17850369286).

20400422024 is a wasteful number, since it uses less digits than its factorization.

20400422024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550052759 (or 2550052755 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 20400422024 its reverse (42022400402), we get a palindrome (62422822426).

The spelling of 20400422024 in words is "twenty billion, four hundred million, four hundred twenty-two thousand, twenty-four".