20664546502 has 16 divisors (see below), whose sum is σ = 31398926400. Its totient is φ = 10198319040.

The previous prime is 20664546499. The next prime is 20664546523. The reversal of 20664546502 is 20564546602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539052 + ... + 576112.

It is an arithmetic number, because the mean of its divisors is an integer number (1962432900).

Almost surely, 2^20664546502 is an apocalyptic number.

20664546502 is a deficient number, since it is larger than the sum of its proper divisors (10734379898).

20664546502 is a wasteful number, since it uses less digits than its factorization.

20664546502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40671.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 20664546502 in words is "twenty billion, six hundred sixty-four million, five hundred forty-six thousand, five hundred two".