20612623 has 4 divisors (see below), whose sum is σ = 21508848. Its totient is φ = 19716400.

The previous prime is 20612621. The next prime is 20612629. The reversal of 20612623 is 32621602.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20612623 - 2¹ = 20612621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20612594 and 20612603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20612621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448078 + ... + 448123.

It is an arithmetic number, because the mean of its divisors is an integer number (5377212).

Almost surely, 2^20612623 is an apocalyptic number.

20612623 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20612623 is a deficient number, since it is larger than the sum of its proper divisors (896225).

20612623 is an equidigital number, since it uses as much as digits as its factorization.

20612623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896224.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20612623 is about 4540.1126638003. The cubic root of 20612623 is about 274.1854597150.

The spelling of 20612623 in words is "twenty million, six hundred twelve thousand, six hundred twenty-three".