20269790 has 16 divisors (see below), whose sum is σ = 37000800. Its totient is φ = 7993440.

The previous prime is 20269771. The next prime is 20269793. The reversal of 20269790 is 9796202.

It is a self number, because there is not a number n which added to its sum of digits gives 20269790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20269793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13565 + ... + 14984.

It is an arithmetic number, because the mean of its divisors is an integer number (2312550).

Almost surely, 2^20269790 is an apocalyptic number.

20269790 is a deficient number, since it is larger than the sum of its proper divisors (16731010).

20269790 is a wasteful number, since it uses less digits than its factorization.

20269790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28627.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 20269790 is about 4502.1983519165. The cubic root of 20269790 is about 272.6568521551.

The spelling of 20269790 in words is "twenty million, two hundred sixty-nine thousand, seven hundred ninety".