20540212210 has 128 divisors (see below), whose sum is σ = 43908687360. Its totient is φ = 6773538816.

The previous prime is 20540212207. The next prime is 20540212213. The reversal of 20540212210 is 1221204502.

It is an interprime number because it is at equal distance from previous prime (20540212207) and next prime (20540212213).

It is not an unprimeable number, because it can be changed into a prime (20540212213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 58187394 + ... + 58187746.

It is an arithmetic number, because the mean of its divisors is an integer number (343036620).

Almost surely, 2^20540212210 is an apocalyptic number.

20540212210 is an abundant number, since it is smaller than the sum of its proper divisors (23368475150).

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

20540212210 is a wasteful number, since it uses less digits than its factorization.

20540212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692.

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 20540212210 its reverse (1221204502), we get a palindrome (21761416712).

The spelling of 20540212210 in words is "twenty billion, five hundred forty million, two hundred twelve thousand, two hundred ten".