20291084 has 24 divisors (see below), whose sum is σ = 39321408. Its totient is φ = 9084240.

The previous prime is 20291077. The next prime is 20291087. The reversal of 20291084 is 48019202.

It is not an unprimeable number, because it can be changed into a prime (20291087) 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, 494 + ... + 6389.

It is an arithmetic number, because the mean of its divisors is an integer number (1638392).

Almost surely, 2^20291084 is an apocalyptic number.

It is an amenable number.

20291084 is a deficient number, since it is larger than the sum of its proper divisors (19030324).

20291084 is a wasteful number, since it uses less digits than its factorization.

20291084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6965 (or 6963 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 20291084 is about 4504.5625758779. The cubic root of 20291084 is about 272.7522967072.

It can be divided in two parts, 2029 and 1084, that added together give a palindrome (3113).

The spelling of 20291084 in words is "twenty million, two hundred ninety-one thousand, eighty-four".