20919082 has 4 divisors (see below), whose sum is σ = 31378626. Its totient is φ = 10459540.

The previous prime is 20919049. The next prime is 20919109. The reversal of 20919082 is 28091902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15202201 + 5716881 = 3899^2 + 2391^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5229769 + ... + 5229772.

Almost surely, 2^20919082 is an apocalyptic number.

20919082 is a deficient number, since it is larger than the sum of its proper divisors (10459544).

20919082 is a wasteful number, since it uses less digits than its factorization.

20919082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10459543.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 20919082 is about 4573.7382959675. The cubic root of 20919082 is about 275.5376017925.

It can be divided in two parts, 209 and 19082, that added together give a palindrome (19291).

The spelling of 20919082 in words is "twenty million, nine hundred nineteen thousand, eighty-two".