20495748 has 72 divisors (see below), whose sum is σ = 59292352. Its totient is φ = 5366016.

The previous prime is 20495731. The next prime is 20495749. The reversal of 20495748 is 84759402.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (20495749) 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, 149536 + ... + 149672.

Almost surely, 2^20495748 is an apocalyptic number.

20495748 is a gapful number since it is divisible by the number (28) 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 20495748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29646176).

20495748 is an abundant number, since it is smaller than the sum of its proper divisors (38796604).

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

20495748 is a wasteful number, since it uses less digits than its factorization.

20495748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 20495748 is about 4527.2229898692. Note that the first 3 decimals coincide. The cubic root of 20495748 is about 273.6662603274. Note that the first 3 decimals are identical.

The spelling of 20495748 in words is "twenty million, four hundred ninety-five thousand, seven hundred forty-eight".