20418722 has 16 divisors (see below), whose sum is σ = 31505760. Its totient is φ = 9919392.

The previous prime is 20418721. The next prime is 20418737. The reversal of 20418722 is 22781402.

It is a super-2 number, since 2×20418722² = 833848416226568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20418691 and 20418700.

It is not an unprimeable number, because it can be changed into a prime (20418721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19529 + ... + 20547.

It is an arithmetic number, because the mean of its divisors is an integer number (1969110).

Almost surely, 2^20418722 is an apocalyptic number.

20418722 is a deficient number, since it is larger than the sum of its proper divisors (11087038).

20418722 is a wasteful number, since it uses less digits than its factorization.

20418722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 20418722 is about 4518.7080011880. The cubic root of 20418722 is about 273.3230041043.

The spelling of 20418722 in words is "twenty million, four hundred eighteen thousand, seven hundred twenty-two".