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20899416 = 233870809
BaseRepresentation
bin100111110111…
…0011001011000
31110022210121110
41033232121120
520322240131
62023540320
7342433146
oct117563130
943283543
1020899416
111088504a
126bba6a0
134439925
142ac0596
151c7c646
hex13ee658

20899416 has 16 divisors (see below), whose sum is σ = 52248600. Its totient is φ = 6966464.

The previous prime is 20899379. The next prime is 20899423. The reversal of 20899416 is 61499802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435381 + ... + 435428.

Almost surely, 220899416 is an apocalyptic number.

It is an amenable number.

20899416 is an abundant number, since it is smaller than the sum of its proper divisors (31349184).

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

20899416 is a wasteful number, since it uses less digits than its factorization.

20899416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870818 (or 870814 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 20899416 is about 4571.5879079375. The cubic root of 20899416 is about 275.4512305485.

The spelling of 20899416 in words is "twenty million, eight hundred ninety-nine thousand, four hundred sixteen".

Divisors: 1 2 3 4 6 8 12 24 870809 1741618 2612427 3483236 5224854 6966472 10449708 20899416