20387210011 has 16 divisors (see below), whose sum is σ = 23531751936. Its totient is φ = 17300889216.

The previous prime is 20387210003. The next prime is 20387210057. The reversal of 20387210011 is 11001278302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20387210011 - 2³ = 20387210003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20381210011) 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, 1376035 + ... + 1390771.

It is an arithmetic number, because the mean of its divisors is an integer number (1470734496).

Almost surely, 2^20387210011 is an apocalyptic number.

20387210011 is a deficient number, since it is larger than the sum of its proper divisors (3144541925).

20387210011 is a wasteful number, since it uses less digits than its factorization.

20387210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16698.

The product of its (nonzero) digits is 672, while the sum is 25.

Adding to 20387210011 its reverse (11001278302), we get a palindrome (31388488313).

The spelling of 20387210011 in words is "twenty billion, three hundred eighty-seven million, two hundred ten thousand, eleven".