20836992 has 64 divisors (see below), whose sum is σ = 60392160. Its totient is φ = 6312960.

The previous prime is 20836973. The next prime is 20836997. The reversal of 20836992 is 29963802.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 20836992.

It is not an unprimeable number, because it can be changed into a prime (20836997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1758 + ... + 6690.

Almost surely, 2^20836992 is an apocalyptic number.

20836992 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 20836992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30196080).

20836992 is an abundant number, since it is smaller than the sum of its proper divisors (39555168).

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

20836992 is a wasteful number, since it uses less digits than its factorization.

20836992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4961 (or 4949 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 20836992 is about 4564.7554151345. The cubic root of 20836992 is about 275.1767106666.

The spelling of 20836992 in words is "twenty million, eight hundred thirty-six thousand, nine hundred ninety-two".