20400163562 has 8 divisors (see below), whose sum is σ = 30600925092. Its totient is φ = 10199855200.

The previous prime is 20400163529. The next prime is 20400163577. The reversal of 20400163562 is 26536100402.

It can be written as a sum of positive squares in 2 ways, for example, as 18681149041 + 1719014521 = 136679^2 + 41461^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 41612 + ... + 206232.

Almost surely, 2^20400163562 is an apocalyptic number.

20400163562 is a deficient number, since it is larger than the sum of its proper divisors (10200761530).

20400163562 is a wasteful number, since it uses less digits than its factorization.

20400163562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226584.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 20400163562 its reverse (26536100402), we get a palindrome (46936263964).

The spelling of 20400163562 in words is "twenty billion, four hundred million, one hundred sixty-three thousand, five hundred sixty-two".