20686433774430 has 64 divisors (see below), whose sum is σ = 50861151609408. Its totient is φ = 5381540413440.

The previous prime is 20686433774423. The next prime is 20686433774431. The reversal of 20686433774430 is 3447733468602.

It is a happy number.

It is a super-2 number, since 2×20686433774430² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20686433774431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22366942 + ... + 23273438.

It is an arithmetic number, because the mean of its divisors is an integer number (794705493897).

Almost surely, 2^{20686433774430} is an apocalyptic number.

20686433774430 is an abundant number, since it is smaller than the sum of its proper divisors (30174717834978).

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

20686433774430 is a wasteful number, since it uses less digits than its factorization.

20686433774430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925101.

The product of its (nonzero) digits is 48771072, while the sum is 57.

The spelling of 20686433774430 in words is "twenty trillion, six hundred eighty-six billion, four hundred thirty-three million, seven hundred seventy-four thousand, four hundred thirty".