20100660511 has 4 divisors (see below), whose sum is σ = 20120387400. Its totient is φ = 20080933624.

The previous prime is 20100660487. The next prime is 20100660523. The reversal of 20100660511 is 11506600102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20100660511 - 2⁷ = 20100660383 is a prime.

It is a super-2 number, since 2×20100660511² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100660571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9861916 + ... + 9863953.

It is an arithmetic number, because the mean of its divisors is an integer number (5030096850).

Almost surely, 2^20100660511 is an apocalyptic number.

20100660511 is a deficient number, since it is larger than the sum of its proper divisors (19726889).

20100660511 is a wasteful number, since it uses less digits than its factorization.

20100660511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19726888.

The product of its (nonzero) digits is 360, while the sum is 22.

The spelling of 20100660511 in words is "twenty billion, one hundred million, six hundred sixty thousand, five hundred eleven".