20798736 has 120 divisors (see below), whose sum is σ = 64460160. Its totient is φ = 5757696.

The previous prime is 20798731. The next prime is 20798759. The reversal of 20798736 is 63789702.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (20798731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86905 + ... + 87143.

It is an arithmetic number, because the mean of its divisors is an integer number (537168).

Almost surely, 2^20798736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20798736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32230080).

20798736 is an abundant number, since it is smaller than the sum of its proper divisors (43661424).

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

20798736 is a wasteful number, since it uses less digits than its factorization.

20798736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 20798736 is about 4560.5631231242. The cubic root of 20798736 is about 275.0082025102.

The spelling of 20798736 in words is "twenty million, seven hundred ninety-eight thousand, seven hundred thirty-six".