20400221104 has 80 divisors (see below), whose sum is σ = 40695395328. Its totient is φ = 9903649536.

The previous prime is 20400221089. The next prime is 20400221123. The reversal of 20400221104 is 40112200402.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33607969 + ... + 33608575.

Almost surely, 2^20400221104 is an apocalyptic number.

It is an amenable number.

20400221104 is a deficient number, since it is larger than the sum of its proper divisors (20295174224).

20400221104 is a wasteful number, since it uses less digits than its factorization.

20400221104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20400221104 its reverse (40112200402), we get a palindrome (60512421506).

The spelling of 20400221104 in words is "twenty billion, four hundred million, two hundred twenty-one thousand, one hundred four".