20253996 has 96 divisors (see below), whose sum is σ = 60999680. Its totient is φ = 5692032.

The previous prime is 20253979. The next prime is 20254009. The reversal of 20253996 is 69935202.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20253996.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55005 + ... + 55371.

Almost surely, 2^20253996 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 20253996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30499840).

20253996 is an abundant number, since it is smaller than the sum of its proper divisors (40745684).

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

20253996 is a wasteful number, since it uses less digits than its factorization.

20253996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 20253996 is about 4500.4439780982. The cubic root of 20253996 is about 272.5860166688.

It can be divided in two parts, 20 and 253996, that added together give a square (254016 = 504²).

The spelling of 20253996 in words is "twenty million, two hundred fifty-three thousand, nine hundred ninety-six".