20623742 has 8 divisors (see below), whose sum is σ = 31933632. Its totient is φ = 9979200.

The previous prime is 20623717. The next prime is 20623747. The reversal of 20623742 is 24732602.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20623747) 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, 166259 + ... + 166382.

It is an arithmetic number, because the mean of its divisors is an integer number (3991704).

Almost surely, 2^20623742 is an apocalyptic number.

20623742 is a deficient number, since it is larger than the sum of its proper divisors (11309890).

20623742 is a wasteful number, since it uses less digits than its factorization.

20623742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332674.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20623742 is about 4541.3370277926. The cubic root of 20623742 is about 274.2347518423.

The spelling of 20623742 in words is "twenty million, six hundred twenty-three thousand, seven hundred forty-two".