20952678266663 has 24 divisors (see below), whose sum is σ = 24919763185968. Its totient is φ = 17499336624000.

The previous prime is 20952678266651. The next prime is 20952678266699. The reversal of 20952678266663 is 36666287625902.

It is not a de Polignac number, because 20952678266663 - 2³⁰ = 20951604524839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20952678266593 and 20952678266602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20952678266603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31232558 + ... + 31896363.

It is an arithmetic number, because the mean of its divisors is an integer number (1038323466082).

Almost surely, 2^{20952678266663} is an apocalyptic number.

20952678266663 is a deficient number, since it is larger than the sum of its proper divisors (3967084919305).

20952678266663 is a wasteful number, since it uses less digits than its factorization.

20952678266663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63129167 (or 63129156 counting only the distinct ones).

The product of its (nonzero) digits is 470292480, while the sum is 68.

The spelling of 20952678266663 in words is "twenty trillion, nine hundred fifty-two billion, six hundred seventy-eight million, two hundred sixty-six thousand, six hundred sixty-three".