20405134222 has 24 divisors (see below), whose sum is σ = 34581340872. Its totient is φ = 8955223200.

The previous prime is 20405134109. The next prime is 20405134259. The reversal of 20405134222 is 22243150402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 532929 + ... + 569932.

It is an arithmetic number, because the mean of its divisors is an integer number (1440889203).

Almost surely, 2^20405134222 is an apocalyptic number.

20405134222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20405134222 is a deficient number, since it is larger than the sum of its proper divisors (14176206650).

20405134222 is a wasteful number, since it uses less digits than its factorization.

20405134222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102932 (or 1102903 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 20405134222 its reverse (22243150402), we get a palindrome (42648284624).

The spelling of 20405134222 in words is "twenty billion, four hundred five million, one hundred thirty-four thousand, two hundred twenty-two".