20205221134 has 32 divisors (see below), whose sum is σ = 35394278400. Its totient is φ = 8470398048.

The previous prime is 20205221131. The next prime is 20205221149. The reversal of 20205221134 is 43112250202.

It is a happy number.

It is a super-2 number, since 2×20205221134² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20205221131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1326192 + ... + 1341340.

It is an arithmetic number, because the mean of its divisors is an integer number (1106071200).

Almost surely, 2^20205221134 is an apocalyptic number.

20205221134 is a deficient number, since it is larger than the sum of its proper divisors (15189057266).

20205221134 is a wasteful number, since it uses less digits than its factorization.

20205221134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17232.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 20205221134 its reverse (43112250202), we get a palindrome (63317471336).

The spelling of 20205221134 in words is "twenty billion, two hundred five million, two hundred twenty-one thousand, one hundred thirty-four".