20837944512 has 336 divisors, whose sum is σ = 75317299200. Its totient is φ = 5350625280.

The previous prime is 20837944489. The next prime is 20837944553. The reversal of 20837944512 is 21544973802.

20837944512 is a `hidden beast` number, since 20 + 8 + 3 + 79 + 44 + 512 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3944689 + ... + 3949967.

Almost surely, 2^20837944512 is an apocalyptic number.

20837944512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20837944512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37658649600).

20837944512 is an abundant number, since it is smaller than the sum of its proper divisors (54479354688).

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

20837944512 is a wasteful number, since it uses less digits than its factorization.

20837944512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5404 (or 5391 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 20837944512 in words is "twenty billion, eight hundred thirty-seven million, nine hundred forty-four thousand, five hundred twelve".