20473742 has 8 divisors (see below), whose sum is σ = 30906696. Its totient is φ = 10171512.

The previous prime is 20473723. The next prime is 20473751. The reversal of 20473742 is 24737402.

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

It is a super-2 number, since 2×20473742² = 838348222965128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32288 + ... + 32915.

It is an arithmetic number, because the mean of its divisors is an integer number (3863337).

Almost surely, 2^20473742 is an apocalyptic number.

20473742 is a deficient number, since it is larger than the sum of its proper divisors (10432954).

20473742 is a wasteful number, since it uses less digits than its factorization.

20473742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65362.

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 20473742 is about 4524.7919289178. The cubic root of 20473742 is about 273.5682813651.

The spelling of 20473742 in words is "twenty million, four hundred seventy-three thousand, seven hundred forty-two".