20688334510 has 16 divisors (see below), whose sum is σ = 38031322176. Its totient is φ = 8099262688.

The previous prime is 20688334493. The next prime is 20688334519. The reversal of 20688334510 is 1543388602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20688334519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22008397 + ... + 22009336.

It is an arithmetic number, because the mean of its divisors is an integer number (2376957636).

Almost surely, 2^20688334510 is an apocalyptic number.

20688334510 is a deficient number, since it is larger than the sum of its proper divisors (17342987666).

20688334510 is a wasteful number, since it uses less digits than its factorization.

20688334510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44017787.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 20688334510 in words is "twenty billion, six hundred eighty-eight million, three hundred thirty-four thousand, five hundred ten".