20056742 has 8 divisors (see below), whose sum is σ = 31668600. Its totient is φ = 9500544.

The previous prime is 20056703. The next prime is 20056769. The reversal of 20056742 is 24765002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263867 + ... + 263942.

It is an arithmetic number, because the mean of its divisors is an integer number (3958575).

Almost surely, 2^20056742 is an apocalyptic number.

20056742 is a deficient number, since it is larger than the sum of its proper divisors (11611858).

20056742 is a wasteful number, since it uses less digits than its factorization.

20056742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527830.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 20056742 is about 4478.4754102261. The cubic root of 20056742 is about 271.6982217519.

The spelling of 20056742 in words is "twenty million, fifty-six thousand, seven hundred forty-two".