20886839424 has 384 divisors, whose sum is σ = 67658460480. Its totient is φ = 6131220480.

The previous prime is 20886839333. The next prime is 20886839453. The reversal of 20886839424 is 42493868802.

20886839424 is a `hidden beast` number, since 208 + 8 + 6 + 8 + 3 + 9 + 424 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×20886839424² (a number of 21 digits) contains 22 as substring.

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, 61978584 + ... + 61978920.

Almost surely, 2^20886839424 is an apocalyptic number.

20886839424 is a gapful number since it is divisible by the number (24) 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 20886839424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33829230240).

20886839424 is an abundant number, since it is smaller than the sum of its proper divisors (46771621056).

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

20886839424 is a wasteful number, since it uses less digits than its factorization.

20886839424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 54.

The spelling of 20886839424 in words is "twenty billion, eight hundred eighty-six million, eight hundred thirty-nine thousand, four hundred twenty-four".