20420213012 has 6 divisors (see below), whose sum is σ = 35735372778. Its totient is φ = 10210106504.

The previous prime is 20420212993. The next prime is 20420213063. The reversal of 20420213012 is 21031202402.

It can be written as a sum of positive squares in only one way, i.e., 13323161476 + 7097051536 = 115426^2 + 84244^2 .

It is a super-2 number, since 2×20420213012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2552526623 + ... + 2552526630.

It is an arithmetic number, because the mean of its divisors is an integer number (5955895463).

Almost surely, 2^20420213012 is an apocalyptic number.

It is an amenable number.

20420213012 is a deficient number, since it is larger than the sum of its proper divisors (15315159766).

20420213012 is a wasteful number, since it uses less digits than its factorization.

20420213012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5105053257 (or 5105053255 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20420213012 its reverse (21031202402), we get a palindrome (41451415414).

The spelling of 20420213012 in words is "twenty billion, four hundred twenty million, two hundred thirteen thousand, twelve".