15220018 has 16 divisors (see below), whose sum is σ = 24973920. Its totient is φ = 6899200.

The previous prime is 15220013. The next prime is 15220031. The reversal of 15220018 is 81002251.

15220018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 15219977 and 15220004.

It is not an unprimeable number, because it can be changed into a prime (15220013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10098 + ... + 11506.

It is an arithmetic number, because the mean of its divisors is an integer number (1560870).

Almost surely, 2^15220018 is an apocalyptic number.

15220018 is a deficient number, since it is larger than the sum of its proper divisors (9753902).

15220018 is a wasteful number, since it uses less digits than its factorization.

15220018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 15220018 is about 3901.2841475596. The cubic root of 15220018 is about 247.8211618231.

Adding to 15220018 its reverse (81002251), we get a palindrome (96222269).

The spelling of 15220018 in words is "fifteen million, two hundred twenty thousand, eighteen".