20626164 has 120 divisors (see below), whose sum is σ = 59764320. Its totient is φ = 6163776.

The previous prime is 20626127. The next prime is 20626171. The reversal of 20626164 is 46162602.

It is a happy number.

20626164 is a `hidden beast` number, since 20 + 626 + 16 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 248467 + ... + 248549.

It is an arithmetic number, because the mean of its divisors is an integer number (498036).

Almost surely, 2^20626164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20626164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29882160).

20626164 is an abundant number, since it is smaller than the sum of its proper divisors (39138156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20626164 is a wasteful number, since it uses less digits than its factorization.

20626164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20626164 is about 4541.6036815204. The cubic root of 20626164 is about 274.2454865669.

Adding to 20626164 its reverse (46162602), we get a palindrome (66788766).

The spelling of 20626164 in words is "twenty million, six hundred twenty-six thousand, one hundred sixty-four".