20834440 has 32 divisors (see below), whose sum is σ = 51140160. Its totient is φ = 7576000.

The previous prime is 20834417. The next prime is 20834461. The reversal of 20834440 is 4443802.

It is a super-2 number, since 2×20834440² = 868147780227200, which contains 22 as substring.

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, 23236 + ... + 24115.

It is an arithmetic number, because the mean of its divisors is an integer number (1598130).

Almost surely, 2^20834440 is an apocalyptic number.

20834440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20834440 is an abundant number, since it is smaller than the sum of its proper divisors (30305720).

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

20834440 is a wasteful number, since it uses less digits than its factorization.

20834440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47373 (or 47369 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 20834440 is about 4564.4758735259. The cubic root of 20834440 is about 275.1654761654.

The spelling of 20834440 in words is "twenty million, eight hundred thirty-four thousand, four hundred forty".