20916252 has 96 divisors (see below), whose sum is σ = 62988800. Its totient is φ = 5878656.

The previous prime is 20916251. The next prime is 20916257. The reversal of 20916252 is 25261902.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20916251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54999 + ... + 55377.

Almost surely, 2^20916252 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 20916252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31494400).

20916252 is an abundant number, since it is smaller than the sum of its proper divisors (42072548).

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

20916252 is a wasteful number, since it uses less digits than its factorization.

20916252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 20916252 is about 4573.4289105659. The cubic root of 20916252 is about 275.5251760309.

It can be divided in two parts, 209 and 16252, that added together give a palindrome (16461).

The spelling of 20916252 in words is "twenty million, nine hundred sixteen thousand, two hundred fifty-two".