20354731674440 has 64 divisors (see below), whose sum is σ = 48493105608960. Its totient is φ = 7662807567360.

The previous prime is 20354731674437. The next prime is 20354731674461. The reversal of 20354731674440 is 4447613745302.

It is a super-2 number, since 2×20354731674440² (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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38107859 + ... + 38638301.

It is an arithmetic number, because the mean of its divisors is an integer number (757704775140).

Almost surely, 2^{20354731674440} is an apocalyptic number.

20354731674440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20354731674440 is an abundant number, since it is smaller than the sum of its proper divisors (28138373934520).

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

20354731674440 is a wasteful number, since it uses less digits than its factorization.

20354731674440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586902 (or 586898 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 50.

The spelling of 20354731674440 in words is "twenty trillion, three hundred fifty-four billion, seven hundred thirty-one million, six hundred seventy-four thousand, four hundred forty".