20400608222402 has 16 divisors (see below), whose sum is σ = 30645322203960. Its totient is φ = 10185504976512.

The previous prime is 20400608222383. The next prime is 20400608222411. The reversal of 20400608222402 is 20422280600402.

It can be written as a sum of positive squares in 4 ways, for example, as 13007859302881 + 7392748919521 = 3606641^2 + 2718961^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8817374 + ... + 10887942.

Almost surely, 2^{20400608222402} is an apocalyptic number.

20400608222402 is a deficient number, since it is larger than the sum of its proper divisors (10244713981558).

20400608222402 is a wasteful number, since it uses less digits than its factorization.

20400608222402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077717.

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 20400608222402 its reverse (20422280600402), we get a palindrome (40822888822804).

The spelling of 20400608222402 in words is "twenty trillion, four hundred billion, six hundred eight million, two hundred twenty-two thousand, four hundred two".