20542706 has 8 divisors (see below), whose sum is σ = 30867804. Its totient is φ = 10253440.

The previous prime is 20542673. The next prime is 20542729. The reversal of 20542706 is 60724502.

It can be written as a sum of positive squares in 2 ways, for example, as 20475625 + 67081 = 4525^2 + 259^2 .

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

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, 7475 + ... + 9846.

Almost surely, 2^20542706 is an apocalyptic number.

20542706 is a deficient number, since it is larger than the sum of its proper divisors (10325098).

20542706 is a wasteful number, since it uses less digits than its factorization.

20542706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17916.

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

The square root of 20542706 is about 4532.4062042143. The cubic root of 20542706 is about 273.8751006930.

The spelling of 20542706 in words is "twenty million, five hundred forty-two thousand, seven hundred six".