20531154222 has 24 divisors (see below), whose sum is σ = 44899911576. Its totient is φ = 6779757456.

The previous prime is 20531154221. The next prime is 20531154223. The reversal of 20531154222 is 22245113502.

20531154222 is a `hidden beast` number, since 205 + 31 + 1 + 5 + 422 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (20531154221) and next prime (20531154223).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20531154221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5328073 + ... + 5331924.

It is an arithmetic number, because the mean of its divisors is an integer number (1870829649).

Almost surely, 2^20531154222 is an apocalyptic number.

20531154222 is an abundant number, since it is smaller than the sum of its proper divisors (24368757354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20531154222 is a wasteful number, since it uses less digits than its factorization.

20531154222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10660112 (or 10660109 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 20531154222 its reverse (22245113502), we get a palindrome (42776267724).

The spelling of 20531154222 in words is "twenty billion, five hundred thirty-one million, one hundred fifty-four thousand, two hundred twenty-two".