20420140012 has 24 divisors (see below), whose sum is σ = 37323130320. Its totient is φ = 9765743040.

The previous prime is 20420139991. The next prime is 20420140021. The reversal of 20420140012 is 21004102402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1160539 + ... + 1178002.

It is an arithmetic number, because the mean of its divisors is an integer number (1555130430).

Almost surely, 2^20420140012 is an apocalyptic number.

It is an amenable number.

20420140012 is a deficient number, since it is larger than the sum of its proper divisors (16902990308).

20420140012 is a wasteful number, since it uses less digits than its factorization.

20420140012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338641 (or 2338639 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20420140012 its reverse (21004102402), we get a palindrome (41424242414).

The spelling of 20420140012 in words is "twenty billion, four hundred twenty million, one hundred forty thousand, twelve".