20664431510 has 16 divisors (see below), whose sum is σ = 37322930736. Its totient is φ = 8237560608.

The previous prime is 20664431509. The next prime is 20664431519. The reversal of 20664431510 is 1513446602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20664431519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3523424 + ... + 3529283.

It is an arithmetic number, because the mean of its divisors is an integer number (2332683171).

Almost surely, 2^20664431510 is an apocalyptic number.

20664431510 is a deficient number, since it is larger than the sum of its proper divisors (16658499226).

20664431510 is a wasteful number, since it uses less digits than its factorization.

20664431510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7053007.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 20664431510 in words is "twenty billion, six hundred sixty-four million, four hundred thirty-one thousand, five hundred ten".