20421370611 has 12 divisors (see below), whose sum is σ = 29609696688. Its totient is φ = 13562480304.

The previous prime is 20421370589. The next prime is 20421370657. The reversal of 20421370611 is 11607312402.

20421370611 is a `hidden beast` number, since 2 + 0 + 42 + 1 + 3 + 7 + 0 + 611 = 666.

It is not a de Polignac number, because 20421370611 - 2⁷ = 20421370483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20421370681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4311400 + ... + 4316133.

It is an arithmetic number, because the mean of its divisors is an integer number (2467474724).

Almost surely, 2^20421370611 is an apocalyptic number.

20421370611 is a deficient number, since it is larger than the sum of its proper divisors (9188326077).

20421370611 is a wasteful number, since it uses less digits than its factorization.

20421370611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8627802 (or 8627799 counting only the distinct ones).

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

The spelling of 20421370611 in words is "twenty billion, four hundred twenty-one million, three hundred seventy thousand, six hundred eleven".