20501622 has 12 divisors (see below), whose sum is σ = 44420220. Its totient is φ = 6833868.

The previous prime is 20501587. The next prime is 20501623. The reversal of 20501622 is 22610502.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1138979 = 20501622 / (2 + 0 + 5 + 0 + 1 + 6 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 20501595 and 20501604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20501623) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 569472 + ... + 569507.

It is an arithmetic number, because the mean of its divisors is an integer number (3701685).

Almost surely, 2^20501622 is an apocalyptic number.

20501622 is an abundant number, since it is smaller than the sum of its proper divisors (23918598).

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

20501622 is a wasteful number, since it uses less digits than its factorization.

20501622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138987 (or 1138984 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20501622 is about 4527.8716854611. The cubic root of 20501622 is about 273.6924017181.

The spelling of 20501622 in words is "twenty million, five hundred one thousand, six hundred twenty-two".