20631122 has 16 divisors (see below), whose sum is σ = 32175360. Its totient is φ = 9909648.

The previous prime is 20631119. The next prime is 20631137. The reversal of 20631122 is 22113602.

It is a self number, because there is not a number n which added to its sum of digits gives 20631122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12383 + ... + 13949.

It is an arithmetic number, because the mean of its divisors is an integer number (2010960).

Almost surely, 2^20631122 is an apocalyptic number.

20631122 is a deficient number, since it is larger than the sum of its proper divisors (11544238).

20631122 is a wasteful number, since it uses less digits than its factorization.

20631122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 20631122 is about 4542.1494911550. The cubic root of 20631122 is about 274.2674586633.

Adding to 20631122 its reverse (22113602), we get a palindrome (42744724).

The spelling of 20631122 in words is "twenty million, six hundred thirty-one thousand, one hundred twenty-two".