20752218 has 24 divisors (see below), whose sum is σ = 47330400. Its totient is φ = 6553224.

The previous prime is 20752217. The next prime is 20752229. The reversal of 20752218 is 81225702.

It is a junction number, because it is equal to n+sod(n) for n = 20752191 and 20752200.

It is not an unprimeable number, because it can be changed into a prime (20752217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29998 + ... + 30681.

It is an arithmetic number, because the mean of its divisors is an integer number (1972100).

Almost surely, 2^20752218 is an apocalyptic number.

20752218 is an abundant number, since it is smaller than the sum of its proper divisors (26578182).

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

20752218 is a wasteful number, since it uses less digits than its factorization.

20752218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60706 (or 60703 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 20752218 is about 4555.4602401953. The cubic root of 20752218 is about 274.8030236823.

It can be divided in two parts, 207 and 52218, that added together give a palindrome (52425).

The spelling of 20752218 in words is "twenty million, seven hundred fifty-two thousand, two hundred eighteen".