20647308932762 has 16 divisors (see below), whose sum is σ = 31395492116520. Its totient is φ = 10182147316992.

The previous prime is 20647308932753. The next prime is 20647308932791. The reversal of 20647308932762 is 26723980374602.

It is a Cunningham number, because it is equal to 4543931²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 13681188018481 + 6966120914281 = 3698809^2 + 2639341^2 .

It is a super-2 number, since 2×20647308932762² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18567164 + ... + 19647752.

Almost surely, 2^{20647308932762} is an apocalyptic number.

20647308932762 is a deficient number, since it is larger than the sum of its proper divisors (10748183183758).

20647308932762 is a wasteful number, since it uses less digits than its factorization.

20647308932762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211537.

The product of its (nonzero) digits is 36578304, while the sum is 59.

The spelling of 20647308932762 in words is "twenty trillion, six hundred forty-seven billion, three hundred eight million, nine hundred thirty-two thousand, seven hundred sixty-two".