20827742 has 32 divisors (see below), whose sum is σ = 36348480. Its totient is φ = 8870400.

The previous prime is 20827727. The next prime is 20827747. The reversal of 20827742 is 24772802.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20827699 and 20827708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20827747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16742 + ... + 17942.

It is an arithmetic number, because the mean of its divisors is an integer number (1135890).

Almost surely, 2^20827742 is an apocalyptic number.

20827742 is a deficient number, since it is larger than the sum of its proper divisors (15520738).

20827742 is a wasteful number, since it uses less digits than its factorization.

20827742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 20827742 is about 4563.7421048959. The cubic root of 20827742 is about 275.1359856375.

The spelling of 20827742 in words is "twenty million, eight hundred twenty-seven thousand, seven hundred forty-two".