20647308932696 has 16 divisors (see below), whose sum is σ = 38713871354640. Its totient is φ = 10323609904800.

The previous prime is 20647308932693. The next prime is 20647308932753. The reversal of 20647308932696 is 69623980374602.

It is a super-2 number, since 2×20647308932696² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20647308932693) 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, 3558236 + ... + 7345451.

It is an arithmetic number, because the mean of its divisors is an integer number (2419616959665).

Almost surely, 2^{20647308932696} is an apocalyptic number.

It is an amenable number.

20647308932696 is a deficient number, since it is larger than the sum of its proper divisors (18066562421944).

20647308932696 is a wasteful number, since it uses less digits than its factorization.

20647308932696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11140394 (or 11140390 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 65.

Adding to 20647308932696 its sum of digits (65), we get a square (20647308932761 = 4543931²).

The spelling of 20647308932696 in words is "twenty trillion, six hundred forty-seven billion, three hundred eight million, nine hundred thirty-two thousand, six hundred ninety-six".