20919084 has 24 divisors (see below), whose sum is σ = 49072128. Its totient is φ = 6935760.

The previous prime is 20919049. The next prime is 20919109. The reversal of 20919084 is 48091902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2272 + ... + 6855.

It is an arithmetic number, because the mean of its divisors is an integer number (2044672).

Almost surely, 2^20919084 is an apocalyptic number.

It is an amenable number.

20919084 is an abundant number, since it is smaller than the sum of its proper divisors (28153044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20919084 is a wasteful number, since it uses less digits than its factorization.

20919084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9325 (or 9323 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 20919084 is about 4573.7385146071. The cubic root of 20919084 is about 275.5376105736.

It can be divided in two parts, 2091 and 9084, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 20919084 in words is "twenty million, nine hundred nineteen thousand, eighty-four".