20290738 has 16 divisors (see below), whose sum is σ = 34203456. Its totient is φ = 8957520.

The previous prime is 20290693. The next prime is 20290747. The reversal of 20290738 is 83709202.

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 7 ways as a sum of consecutive naturals, for example, 16368 + ... + 17563.

It is an arithmetic number, because the mean of its divisors is an integer number (2137716).

Almost surely, 2^20290738 is an apocalyptic number.

20290738 is a deficient number, since it is larger than the sum of its proper divisors (13912718).

20290738 is a wasteful number, since it uses less digits than its factorization.

20290738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33969.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20290738 is about 4504.5241702093. The cubic root of 20290738 is about 272.7507463903.

The spelling of 20290738 in words is "twenty million, two hundred ninety thousand, seven hundred thirty-eight".