20551022 has 8 divisors (see below), whose sum is σ = 31332072. Its totient is φ = 10107000.

The previous prime is 20551019. The next prime is 20551043. The reversal of 20551022 is 22015502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84104 + ... + 84347.

It is an arithmetic number, because the mean of its divisors is an integer number (3916509).

Almost surely, 2^20551022 is an apocalyptic number.

20551022 is a deficient number, since it is larger than the sum of its proper divisors (10781050).

20551022 is a wasteful number, since it uses less digits than its factorization.

20551022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168514.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20551022 is about 4533.3235048913. The cubic root of 20551022 is about 273.9120519768.

Adding to 20551022 its reverse (22015502), we get a palindrome (42566524).

The spelling of 20551022 in words is "twenty million, five hundred fifty-one thousand, twenty-two".