20420133112 has 64 divisors (see below), whose sum is σ = 40617158400. Its totient is φ = 9597600000.

The previous prime is 20420133089. The next prime is 20420133119. The reversal of 20420133112 is 21133102402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 20420133112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420133119) 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, 11864412 + ... + 11866132.

It is an arithmetic number, because the mean of its divisors is an integer number (634643100).

Almost surely, 2^20420133112 is an apocalyptic number.

It is an amenable number.

20420133112 is a deficient number, since it is larger than the sum of its proper divisors (20197025288).

20420133112 is a wasteful number, since it uses less digits than its factorization.

20420133112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308 (or 2304 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20420133112 its reverse (21133102402), we get a palindrome (41553235514).

The spelling of 20420133112 in words is "twenty billion, four hundred twenty million, one hundred thirty-three thousand, one hundred twelve".