20402182 has 16 divisors (see below), whose sum is σ = 31471200. Its totient is φ = 9915840.

The previous prime is 20402153. The next prime is 20402189. The reversal of 20402182 is 28120402.

It is a super-2 number, since 2×20402182² = 832498060722248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402189) 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, 9919 + ... + 11797.

It is an arithmetic number, because the mean of its divisors is an integer number (1966950).

Almost surely, 2^20402182 is an apocalyptic number.

20402182 is a deficient number, since it is larger than the sum of its proper divisors (11069018).

20402182 is a wasteful number, since it uses less digits than its factorization.

20402182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 20402182 is about 4516.8774612557. The cubic root of 20402182 is about 273.2491832305.

Adding to 20402182 its reverse (28120402), we get a palindrome (48522584).

The spelling of 20402182 in words is "twenty million, four hundred two thousand, one hundred eighty-two".