20731212162 has 24 divisors (see below), whose sum is σ = 44942831856. Its totient is φ = 6906526296.

The previous prime is 20731212121. The next prime is 20731212179. The reversal of 20731212162 is 26121213702.

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, 290088 + ... + 354419.

It is an arithmetic number, because the mean of its divisors is an integer number (1872617994).

Almost surely, 2^20731212162 is an apocalyptic number.

20731212162 is an abundant number, since it is smaller than the sum of its proper divisors (24211619694).

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

20731212162 is a wasteful number, since it uses less digits than its factorization.

20731212162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646302 (or 646299 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

Adding to 20731212162 its reverse (26121213702), we get a palindrome (46852425864).

The spelling of 20731212162 in words is "twenty billion, seven hundred thirty-one million, two hundred twelve thousand, one hundred sixty-two".