20837380540 has 12 divisors (see below), whose sum is σ = 43758499176. Its totient is φ = 8334952208.

The previous prime is 20837380517. The next prime is 20837380631. The reversal of 20837380540 is 4508373802.

It is a junction number, because it is equal to n+sod(n) for n = 20837380493 and 20837380502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520934494 + ... + 520934533.

It is an arithmetic number, because the mean of its divisors is an integer number (3646541598).

Almost surely, 2^20837380540 is an apocalyptic number.

20837380540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20837380540 is an abundant number, since it is smaller than the sum of its proper divisors (22921118636).

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

20837380540 is a wasteful number, since it uses less digits than its factorization.

20837380540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041869036 (or 1041869034 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 20837380540 in words is "twenty billion, eight hundred thirty-seven million, three hundred eighty thousand, five hundred forty".