20723752 has 16 divisors (see below), whose sum is σ = 44408160. Its totient is φ = 8881584.

The previous prime is 20723749. The next prime is 20723753. The reversal of 20723752 is 25732702.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 20723752.

It is not an unprimeable number, because it can be changed into a prime (20723753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184978 + ... + 185089.

It is an arithmetic number, because the mean of its divisors is an integer number (2775510).

Almost surely, 2^20723752 is an apocalyptic number.

It is an amenable number.

20723752 is an abundant number, since it is smaller than the sum of its proper divisors (23684408).

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

20723752 is a wasteful number, since it uses less digits than its factorization.

20723752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370080 (or 370076 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 20723752 is about 4552.3347855798. The cubic root of 20723752 is about 274.6773162784.

The spelling of 20723752 in words is "twenty million, seven hundred twenty-three thousand, seven hundred fifty-two".