20634665132040 has 64 divisors (see below), whose sum is σ = 62505005097600. Its totient is φ = 5449154284032.

The previous prime is 20634665131979. The next prime is 20634665132063. The reversal of 20634665132040 is 4023156643602.

It is a happy number.

It is a super-2 number, since 2×20634665132040² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20634665131983 and 20634665132001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 834723285 + ... + 834748004.

It is an arithmetic number, because the mean of its divisors is an integer number (976640704650).

Almost surely, 2^{20634665132040} is an apocalyptic number.

20634665132040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20634665132040 is an abundant number, since it is smaller than the sum of its proper divisors (41870339965560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20634665132040 is a wasteful number, since it uses less digits than its factorization.

20634665132040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669471406 (or 1669471402 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 20634665132040 in words is "twenty trillion, six hundred thirty-four billion, six hundred sixty-five million, one hundred thirty-two thousand, forty".