20474746 has 8 divisors (see below), whose sum is σ = 31101120. Its totient is φ = 10107708.

The previous prime is 20474743. The next prime is 20474747. The reversal of 20474746 is 64747402.

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

It is not an unprimeable number, because it can be changed into a prime (20474743) 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, 64636 + ... + 64951.

It is an arithmetic number, because the mean of its divisors is an integer number (3887640).

Almost surely, 2^20474746 is an apocalyptic number.

20474746 is a deficient number, since it is larger than the sum of its proper divisors (10626374).

20474746 is a wasteful number, since it uses less digits than its factorization.

20474746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129668.

The product of its (nonzero) digits is 37632, while the sum is 34.

The square root of 20474746 is about 4524.9028718858. The cubic root of 20474746 is about 273.5727530776.

The spelling of 20474746 in words is "twenty million, four hundred seventy-four thousand, seven hundred forty-six".