20623622 has 4 divisors (see below), whose sum is σ = 30935436. Its totient is φ = 10311810.

The previous prime is 20623621. The next prime is 20623643. The reversal of 20623622 is 22632602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20623621) 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 as a sum of consecutive naturals, namely, 5155904 + ... + 5155907.

It is an arithmetic number, because the mean of its divisors is an integer number (7733859).

Almost surely, 2^20623622 is an apocalyptic number.

20623622 is a deficient number, since it is larger than the sum of its proper divisors (10311814).

20623622 is a wasteful number, since it uses less digits than its factorization.

20623622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10311813.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 20623622 is about 4541.3238158053. The cubic root of 20623622 is about 274.2342199596.

The spelling of 20623622 in words is "twenty million, six hundred twenty-three thousand, six hundred twenty-two".