20783574010940 has 48 divisors (see below), whose sum is σ = 47003413901472. Its totient is φ = 7673843279616.

The previous prime is 20783574010799. The next prime is 20783574010949. The reversal of 20783574010940 is 4901047538702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20783574010949) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 23651522 + ... + 24514518.

It is an arithmetic number, because the mean of its divisors is an integer number (979237789614).

Almost surely, 2^{20783574010940} is an apocalyptic number.

20783574010940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20783574010940 is an abundant number, since it is smaller than the sum of its proper divisors (26219839890532).

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

20783574010940 is a wasteful number, since it uses less digits than its factorization.

20783574010940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955646 (or 955644 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 20783574010940 in words is "twenty trillion, seven hundred eighty-three billion, five hundred seventy-four million, ten thousand, nine hundred forty".