22000400042 has 4 divisors (see below), whose sum is σ = 33000600066. Its totient is φ = 11000200020.

The previous prime is 22000400033. The next prime is 22000400069. The reversal of 22000400042 is 24000400022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21782512921 + 217887121 = 147589^2 + 14761^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500100009 + ... + 5500100012.

Almost surely, 2^22000400042 is an apocalyptic number.

22000400042 is a deficient number, since it is larger than the sum of its proper divisors (11000200024).

22000400042 is a wasteful number, since it uses less digits than its factorization.

22000400042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11000200023.

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 22000400042 its reverse (24000400022), we get a palindrome (46000800064).

The spelling of 22000400042 in words is "twenty-two billion, four hundred thousand, forty-two".